Farco airshotgun

ARS FARCO AIR SHOTGUN updated 28/7-2011

Total Farco numbers So far 112, 149, 199 Lacks receiver, 001,100,515,567,605 has receiver


To see were these Farco went so far

Spain number 100

Sweden number 112

USA number 001, 567,149,199, 515

Finland number 605



Below the very first Farco number 001, owned by  Davis Schwesinger (Air rifle specialists)




I will do more testing and all of my results will be put up here on this website and i would like you all too tribute with test results in shoot/ball/wads/fps/tuning/hunting/pictures anything that you would share about this marvelous shotgun.

The Farco is a Co2 shotgun made in Philippines. These were imported to the USA from around 1988 to 2001 by Davis Schwesinger (Air rifle specialists).

I have always been found of shotguns driven either by air or co2. Hell i have been found by airguns long, short, rifled, smooth driven by all kind of propulsion ever since i first had my own airgun over 20 years ago. Farco uses brass shells that are nearly 1 inch long (2,54 cm) and a half inch wide (1,3 cm ). This is a real 28 guage ( 51 kaliber) scattergun that can bring down small mammals and take care of a variety of pests, such as rats.

Big loading port for the shells


Its powerful both in shoot mode and in round balls. The Farco is handmade and that is evident when you take a closer look. But its performance is really good, though i am still testing with other springs and weights to get the best performance. I must say i have not done much about it until recently,

Testing the Farco now is not a good idee due to the cold weather (Jan 2011) co2 works best in warm weather. To get things working just plug in the hose from a co2 canister open up and let the co2 fill up. This monster takes a lot of co2. I have bought a quick connector so that i wonít tear out the treads on the tube.

The gun is now full with co2 and before this you have filled up a shell with shoots.



Cork, wadcutter tool, pre cut wads, shoots,bullets, roundball


Depending on watt thickness of wads you use you can get loads up to 230 grains (15 gram). I use both cork in 3 mm thickness and pre cut fibre wads these are only 1 mm thick.

. To get the wads from cork a use a cutter tool in 51 kaliber. Due to their thickness a smaller amount of shoot can be filled up in the shells.

I only got 5 shells when I bought the Farco and i wanted some extra shells, these i ordered from ARS, ( i know i can make these from all kind of materials but i wanted the original) but to my surprise i found these to be 1,45 cm wide and all my efforts to get the right cutter tool and the cork( believe me i had to search a long time before i found these) was no good for these.



Filling up with co2, note the BIG muzzle

As i been told these were later made shells and to use these i grinned one shell to use as a cutter tool to these. These works fine and takes a few more shoots. But be careful if loaded with round balls that fits in the shell wonít go trough the barrel witch are 1,3 cm at the muzzle. To load just bring up the handle a bit and draw it back load a shell and return the handle. Aim and squeeze the trigger, it all takes a while before its beginning to "roar".

As you see the number 112 turns up everywhere


I got my Farco here in Sweden from a previous owner that had not taken good care of the shotgun. All nickel finish had been removed and the safety was missing, but i bought it anyway knowing that only 4 of these came in to this country by a Swedish airgun dealer.



Front sight the big transfer port of co2


I will do more testing and all of my results will be put up here on this website and i would like you all too tribute with test results in shoot/ball/wads/fps/tuning/hunting/pictures anything that you would share about this marvelous shotgun.



Quick connector, the internal, note the aluminium bit behind the spring is not original, back sight

My Farco has number 112 stamped all over and this number is found everywhere but on my trigger i found the number 177. Stamped on right side ARS FARCO 112 AIR SHOTGUN and on the left MADE IN RP the receiver is not grooved for scope mounts.

A look around on internet and with other owners of the Farco i have found that Number 149 lacks the receiver for mounts, but number 567 has a receiver, the highest number i know of is 605. If you have a Farco shotgun plz send in number and pictures.

So far 112, 149 Lacks receiver, 567,605 has receiver.

Here you can cleraly see the diffrents betwen the FArco number 112 ( Kenth Friberg)  to the left and 567 ( Rich) on the right

Below is the nr 515 from Steve along with text

Hello Kenth.

 I took a few photos of the receiver this weekend, although the flash didnít seem to work very well.  Nevertheless, you can still see everything.

 I didnít have any recent hunting photos, but the coon and fox on my wall there were both taken with the Farco.  Iíve also taken pheasant, squirrels, rabbits, doves, starlings, crows, chipmunks, woodchucks, rats, etc. with it.

 I found my Farco in a small gun shop in eastern PA about 13 years ago.  I paid $425 for it then.  I use both a hand pump and a nitrogen cylinder for charging.  If I am going to shoot long strings of trap shooting in the back yard, I use the cylinder.  A 125 cubic foot cylinder at 2200 PSI gives me roughly 450 shots (for about $35), and I get about four good shots per individual charge at 1500 PSI.  I have a regulator that steps-down the pressure from 2200 to 1500 PSI.  Dave S. of Air Rifle specialists made a bunch of extra shells for me to keep handy, loaded with shot.  When trap shooting, I fire about 90 pieces of #6 shot (about 170-175 grains) at roughly 500-550 FPS.  Thatís 95-100 ft-lbs.  Loaded with a toilet paper over-wad, these patterns spread at about 1.1 inches per yard of travel.  I have clocked .433 balls with the muzzle-loading sabots well above 700 FPS (130 ft-lbs), but I find that the velocity is fairly inconsistent, and overall not accurate enough beyond 20 yards or so for game.  For larger moving game (foxes, woodchucks), I usually use 8-9 pieces of #4 buck shot, which spread to about 12-inches in diameter at 30 feet.  If I could find it, I would switch to #2 shot to gain more pellets, but this doesnít seem to be a popular shot size any more.


Recently, I noticed that the single thin lug on the bolt was bending, and the thin brass wall of the receiver was deforming from the sudden pressure applied during firing.  I decided to replace the thin lug with a ľ-inch high strength steel bolt and add a second one at the top of the receiver, where the scope rail offered a thicker location to make a shoulder for the lug to bear on.  I had to carefully file the long slot that the hammer cocking pin rides through so that the thicker lug would fit, but it was worth it.  I cut the shoulder in the top of the receiver with a Dremel tool.  It looks a little crude, but the extra safety is well worth it in my mind.  The O-ring at the rear of the bolt is a tight fit into the receiver tube, and provides a nice snug lock-up when the bolt is closed.  I also added a second O-ring at the front of the bolt to help reduce leakage from the breech.  That ring is not as tight as Iíd like it, because I have noticed that the edges of the cocking slot inside tend to destroy tight-fitting rings quickly.  However, even with the less-than-ideal rings at the front, the leakage is less than with only one ring.





Below is other owners of the Farco shotgun

Rich owns a Farco with number 567 and this has the receiver very nice nickel finish and is marked FARCO ARS 567 SHOTGUN and

on left MADE IN RP also S and F where the safety is. Also some cosmetic nice details as the black/blued trigger and mechanism. The loading port seems to me lengthen also.

Nice shells with sabot and rounball


Nice hunting pictures i think it is a rattle snake that has been taken by the Farco, also sabot with 44 roundball and a .22 diabol in comparision

Here is another proud owner Russel with number 199

This one was actual bought in the Philippines. I think it was intended for the USA market due to the fact that it was marked with ARS ( Air rifle specialists).

Russel says he sent the gun to a gunsmith in Texas that made him a .22 insert barrel. Note lacking the reciever.




Owned by "ML" number 605

Here is a the highest number so far, notice the more longer loading port.


Here is a modifed Farco, text taken from Canadian airgunforum by Hollowjacket

I got set up and one of our local paintball shops let me use their chrony setup to test my .50 farco.
I tried first with CO2, the ambient temperature was around 77 degrees inside the building and the max fps I got out of that was 440fps. I then emptied and switched to HPA and the max fps I got with that was 520fps, an 80fps gain!!!

Both tests were using a 180grain .495 Hornady roundball. Not bad for an airgun entirely made by hand in the Phillipines!

That's 70 foot pounds with CO2 and then a whopping 108 foot pounds with HPA, the only problem is that I only get 1 "big shot" with HPA whereas I get about 8 with CO2 because it actually holds liquid CO2.Not so bad though, I have it set up with a quick connect system, so loading HPA only takes about 30 seconds each time.

Actually, I have been gone for a while, just got back on the weekend, did some great hunting with the butchered collector piece...after I modded it some more to accept hpa!!!
Now I can shoot year round, I set a regulator to fill at 850psi and no problems, no problems with CO2 either, works great.
I only get 3 full power shots with hpa though, where with CO2 I get 8.
I just carry the tank on a backpack and connect with a hose when I need to fill.
Got 3 hares and 2 partridges, but got bored so started in on the crows, not much left of anything after a .495 goes through it!! Had a couple of small buck in view, but out of season and not with and airgun either.

Restored the stock, original Philippines hard fruitwood, solid brass construction. I removed the nickel finish and polished brass and then coated with an acrylic urethane clearcoat. polished all internals and rebuilt valve seal and silver soldered access hole that I had to make to resurface the valve face. Holds air and shoots fine, the patch is between the air cylinder and the stock, so you don't see it other than the lip on either side. So, I built up the sides into square blocks that I engraved the Farco name into.
I shoot a .495 roundball at 495fps

 Owner Hollowjacket Unknown number modified

Below how he modified the Farco

To get the valve out, you need a long piece(about 3 feet) of 3/4 inch flatstock steel. You need to taper the edge of one end to be like a screwdriver and then take the fill valve off the end of the air chamber. You then insert the flatstock, tapered side down and get to the valve, it has a groove like a screw, insert the end of the flatstock and turn slightly to unlatch it from the small piece that is holding it there. There is a large spring under the valve. I fixed the cup seal by putting in a new one designed from the rubber of a scooter wheel. I then resurfaced the valve seating face by inserting a long shank drill bit with a grinder on the end and then polished it the same way. I have been able to fill my farco with 1800psi of high pressure air from a scuba tank and have had very good results around 700fps with a .50 roundball. I find I get better results when I cloth patch and muzzle load with a rod.
For shells I just use regular copper 3/4 inch pipe that I put on a drill and sand the outside diameter down to fit. I then cloth patch each roundball and insert into the shell. I can manually load these into the breach although I get varied fps results this way. More consistant with muzzle load, but with HPA I still get much more power than with CO2. BTW, mine I had cut a 1x2 inch hole in the air chamber to originally fix the valve face and then patched with 1/8th copper sheet and silver machine solder. I have had no problems with this repair regardless of what some people might say, the patch will withstand up to 10,000psi. I will not push it past 2000psi though, just to err on the side of caution.
I now have a shinsung 9mm that I am playing with and putting through it's paces.




Here is a very nice revue about the Farco written in spanish, and translated from spanish to english by a translater on internet se below

This is were things get really  confused. I have model number 112, i do not have the receiver for scopemounts and marked ARS FARCO 112 AIR SHOTGUN

And this guy called Mico971 on this forum see link here has a Farco marked ARS FARCO NO100 SHOTGUN and has the receiver

Farco examples with higher numbers also lack the receiver, was it so that depending on what person worked on the gun made a receiver or was some orded whitout it?

For the first time i see how the valve lockes like, and also get a good tip of how to take it out. Very nice revue and excellent pictures.



A very nice example own by"Mico971" Number 100

Close up on the safety note the extra S Front sight

Rear sight and trigger

The internals laid out, the "hammer" weight to the right

The big loading port and the massive handle

The valve with the old spring and broken pin, the left shows the new spring

To the left the special tool, that were made to take out the valve, to the left number 100

The safety marked X8, and some shells with sabot and balls

Here is the translation/See above for link to spanish site Also note that more then 300 hundred examples were made according to the serial numbers i found so far the highest is 605

Weapons of old: ARS FARCO Shotgun .51 cal

The year was 1972 when the government of the Republic of the Philippines decided to ban the possession of firearms to the population, seized them all. It nevertheless allowed the possession and use of airguns, because much of its population is rural and at these sites subsistence hunting becomes an important addition to family support.
So, the air weapons became critical and almost took the place of fire, and one in particular came to prominence as a versatile weapon that allowed it to use both CO2 and compressed air, while offering the possibility shoot tips and balls of lead or "rounds" with buckshot.
We're talking about ARS Shotgun FARCO of lime. 51.

These rifles were manufactured by a small company called Art Metal Grion. Were made by hand and with hand tools based on hammers, saws, torches and welders, etc., And using basic materials such as wood, brass pipes, aluminum. These materials were undoubtedly chosen to endure over time in the harsh conditions of heat and humidity of that archipelago, no rust ever.
On sight called attention to the dimensions of the rifle, the 123 ctms. measuring total, 76.2 correspond to the barrel (30 "barrel). A full-scale cannon. The weight is quite contained, three kilos a hundred grams make it quite manageable.
This particular unit came with the metal parts painted by brush or spray with normal paint and varnished wood anyway. Its owner has undergone a careful restoration work until the original appearance of the model. I pass a picture of the state in which he was to get there:

Although no one knows exactly how it is said that only 300 units were produced of this model, you see here bears the number 100

These weapons are very different from most air guns. As I said they are weapons capable of firing lead balls weighing about 140 grams. or shotgun shooting in, pun intended: as shotgun cartridges.
Both look up as the barrel are welded tightly, like the sliders to viewers:

For adjustment had to dip into the file and hit alternately long and short shots would test the skills of the owner continuously.
The trigger and trigger guard are all-aluminum:

The charging port is very generous, it must be by force. Here it is with a pellet of 4.5 for the size comparťis

The charging handle (lock), which together with simple shuts off the gas, is also enormous. But it is very practical:

The charging handle (lock), which together with simple shuts off the gas, is also enormous. But it is very practical

Insurance, rudimentary but effective:

With the rifle was supplied a few pieces of brass tubing of 2.5 cm. which acted as pellets filled with cartridges. On the inside of the barrel, right-side loading port, there is a flash that does not pass the piece of pipe, so that once made the shot must be removed manually making it reusable. Placed a block of cork or cardboard, stuffed the shot and was sealed with another block, we already have about the cartridge. Depending on the weight of the pellets the expansion was more or less pronounced. Presumably, the use of these cartridges was focused on the hunt at close range, to bring down an animal that may appear suddenly or was posted on a tree in the forest. The other way was to introduce these same tubes in a muzzleloading sabot with a .45 cal ball and used with a single bullet and the .51 cal is reduced by the .45 sabot itself:

With this type of ammunition were advertised powers of the order of 100/110 joules using balls of about 140 grs. And with tips of 240 grams, although more slowly, reached the 130 jls. That are not jokes.
An American, a tune called Davis Schwesinger and using compressed air to 100 bar only got a power of about 260 jls. (!!). I do not know if that statement is true or if it is part of the legend of the FARC.
It is clear that the high temperatures of the Philippines and this gun permit so long to get the most out of CO2. Ninety bars of pressure there had to pay a lot. Could be filled with air to about 110 bar without any problems.

It was later, in the U.S., when its use became widespread air and thus was the beginning of its decline. Some users are unaware of the limitations of the rifle, hand thinking about having a normal PCP, loaded to 200 bars and the inevitable happened. There were some depot explosions an accident resulting in injury to its owner. These isolated incidents helped create a bad name Farco and coinciding with the emergence and rise in the U.S. market for Korean Big Bores, soon ceased to be imported and were forgotten, now becoming collector's items.
As a curiosity can say that also produced some in caliber 6.35 (0.25) and the only thing apart from his older brother is inside the barrel of .51 cal had introduced another soldier of .25 cal. Curious and particular system.
I'm sure I left some information, detail or anecdote in the pipeline. If I remember and it is important and I will tell you.
I hope you enjoy so beautiful and unique collector's item.
Dedicated to my friend Raul.

And here continued

Hi buddies.
I will revisit the issue of the FARC to show you some of its curious secrets. If you already see a Farco difficult, more difficult is to see inside.
It is that suddenly began to lose air and within minutes it was completely empty. We were talking with the owner and decided to open it to see what happened and fix it, seem to belong in any meeting.
Hands. It is mandatory that all the facilities that are of incredible simplicity and effectiveness. No longer may be more practical and simple, but as the same rifle extra dimensions. You'll see.
A couple of days ago was talking with a dear friend about this work, on the proportions of its parts, the rifle itself, performance, etc., Are you going to let me play you a few lines that put me in one of his mails, which will be an excellent introduction.
"The piece x8 must be a trigger lock. The photos and high definition display clearly a concept and craft bills. The trigger has not received even polished. This type of big bore rifles more understandable and relevant the story of Lewis Clark or Girandoni and eighteenth centuries. It does not need power when what we are carrying is a massive projectile. The human vermin or not, that these weapons have to bring down not usually withstand an impact with one of those cuties pending keep flying. I read in your mail has also won a porrillo July between worn and spring board up ... where are we? 140? "180?" .52 Cal? 100 m / sec can be very serious with one of those "bullets" for a / c of 147 (i think) grains with a skirt so curious. Come on, throw it to someone's arm to 10 meters and you hurt to 6 m / s. I do not even think about 100 meters sg , rotating on itself, and accurately addressed. "
A perfect synthesis of the FARC and what we will see.
A pin and a pair of screws are enough to fit into place the super bolt, spring and super super hammer. You can also see the group equally parsimonious trigger consists of a couple of pieces and a spring pin.

In this picture had changed since the spring, carrying everything was rusted and twisted, we still had the original. The owner retains and even lose all grace because it is clean I take a picture.
Here's a breakdown of the "Peas" hammer. I do not know that because my electronic scale weighs gives me error by excess weight, but sure, absolutely sure, weighing over 200 grams. No exaggeration, it is solid:

A detail of the trigger group, all hand made. The trigger even unpolished aluminum. The piece is stamped with the X8 insurance. As we said simple but effective work by pushing the trigger forward, backward, releasing it. Pay attention to the work piece and holds the hammer by the "step" that has:

This comes now you can see the mega cap as it was with the original spring filipino. I said I would rather have the valve and valve components, because Valve has not as such. The same air reservoir container made of these components.
This small board you see in the needle is the one that caused the air leak and had to be replaced:

It was not as easy as it seems at first sight. These components come from the front of the tank. The piece is on the right with these notches and makes spring pin in the top court takes a turn with a screwdriver. And do not think that serves any screwdriver, no no. Screwdriver is needed more than 70 inches to reach out and agree with me that not everyone takes home a spear of these, so we had to do one with a metal rod:

This is the valve assembly and the board changed and a new spring. You had ever seen one with that size??:

On the inside of the tank there is a solder point that juts into a "package" we say, that the introduction of part / spring pin passing through the notches and pushing and compressing the spring with the screwdriver is placed behind , turned left and locked the valve assembly.
As shown, a part of changing the board dries, also have changed the hammer spring and the valve needle and thus the performance has been greatly improved. The hammer was already up and offered little force and against the valve is now smoother. The result is obvious. General cleaning including the need MOLIKOTE youth have returned.
I hope you liked it


Here is a nice picture taken by the author above, named Miquel. Added 26/2-2011



A photo: a shot at 30 m. with .454 round ball of 137 grains with sabot. Was the sixth shot of the same charge.

Note that the roundball is fully inbedded in the wood at 30 m

Here is a nice tip about loading, found this somewhere on the internet by Steve


Just a comment in regarss to the Farco breaking clays - it can be done, but you have to charge with air (or nitrogen)to about 1200-1400 PSI. Even then, you will only get 3-4 useful shots.

 I have experimented for years with breaking clays, and the answer tuyned out to be simple - use air and load the shells with toilet paper. In loading the shells, take a .40 inch diameter (approx.) dowel and fold a single sheet of single-ply toilet paper onto the end. Carefully push this into the shell and fold back the portion of paper that does not go into the shell, like a funnel, so that you have a "cup" of toilet paper inside the shell.

   Put in no more than 180 grains of #6 shot (smaller sizes DON'T work for clays) and stuff-in the rest of the paper behind it, keeping the shell firmly pressed agains the work surface. This is only about 90 pieces of shot, so it's not much. Then, as a final pusher-wad, put in a card board or cork wad on top of the compacted paper. The shell should now have a thin (one ply) over-wad holding the shot in. It is a little fragile, but worth the extra effort.

   This load gives be about 590 FPS in my Farco, and will reliably break clays even out to 30 yards. You will see an instant increase in pattern tightness too with this method. My theory is that the toilet paper opens and prevents the pusher wad from spoiling the pattern, as I have experimented with discentigrating overwads in the past which had no effect on tightening the pattern




Below are litteratur and advertisement from Air rifle Specialists



Above Deer taken with a Farco shotgun, advertisement Air rifle Specialists



advertisement Air rifle Specialists


Additional reading about the Farco can you find in Airgun Revue 2 , Airgun Revue 5, Airgun Letter August 1995, Airgun Digest 3 edition

Additional reading about the Farco can you find here



Dont forget the dvd Big Bore Airguns with Mike Holloway doing a revue of the Big FArco

Mail me if you want to order the Big Bore Dvd


Did some more testshooting after some work on the hammerspring, note there is still only 14 degres celsius.


The shell took 300 , 2mm shoot, total weight 15,5 gram- 423 fps total 89 ft-ibs or 120 joules

The shell took 200 , 2,5 mm shoot, total weight 15,5 gram- 430 fps total 95 ft-ibs or 126 joules Highest so far

Also load a shell half way 8 gram 497 fps total 66 ft-ibs or 90 Joule

My new gun!

Every thing you need for some serious testing.


Well i have done some testing, but it was only 14 degrees celsius and i used co2 you can figure it out. Next time i will test with air. Also i belive the spring that hits the valve open can be replaced to a harder one. Ok less shoot but with increase in fps i gain some advantged.

Some results.

The shell is 1 inch in length and is 13 mm in diameter. weighs 12 gram, the total weight is for shoot only.

All shoots at 15 meter

The shell took 300 , 2mm shoot, total weight 15,5 gram- 352 fps total 60 ft-ibs or 82 joules

The shell took 200 , 2,5 mm shoot, total weight 15,5 gram- 354 fps total 60 ft-ibs or 82 joules

The shell took 110 , 3 mm shoot, total weight 15 gram- no reading

The shell took 30 , 4,5mm shoot, total weight 14,8 gram- 344 fps total 55 ft-ibs or 75 joules

The shell took 15 , 5,5mm shoot, total weight 15,5 gram- no reading

Note this was a cold day, in warmer weather the numbers will raise, i will test with air and hope the Farco will perform better, but remember the farco was built to use co2 with big chanels for expanding co2.

Note some shoot are in top above center,  i had to hold over the chronograf. i should have shoot them seperatly. 


Shoots at 15 meter

300 st 2 mm

Shoots at 15 meter

200 st 2,5 mm

Shoots at 15 meter

30 st 4,5 mm

Shoots at 15 meter

15 st 5,5 mm

Shoots at 15 meter

110 st 3mm