Can this be done?
 

I was wondering, would it be possible to mount an M203 grenade launcher on an Armalite AR-10-series rifle or carbine? That way you had the stopping power and longer range of the 7.62x51mm NATO round and the anti-materiel capability of the M203 all in one package. Just a random thought I had. While we're on the subject, is it possible to convert an AR-10 to auto or burst mode like with an AR-15?

The original ar-10 was full auto, and an m203 can be mounted.

But the original AR-10 is definately not the same gun as today's AR-10. And if the AR-10 has a picatinny rail and a barrel stepping (like on 16" carbine A4 models) then I suppose you could fit an M203. But AR-10s aren't issued to military and you can't own a M203 without a destructive device liscense (and in my case, I can't even buy the fake Cobray flare launchers, because flare guns are banned in NY :P) so it seems like a slim chance this is a neccesary modification.

I believe the OP is more interested in it being a possible infantry weapon. Aren't m203s attached by some type of rail system?

That's what I mean by picatinny rails. The rails attached to the bottom of the forend attach the base of the launcher and a mounting ring is wrapped around the barrel, which fits in place because of the stepping in the barrel (that's why barrels for guns like M4A1s have that increase/decrease in barrel thickness).

P.S. 666 post! oooooooh.....

Are the current production Armalite AR-10s really that different from the AR-15 internally? Both guns are, caliber aside, more or less the same weapon. I would imagine that most sears that fit in AR-15s would fit in -10s. And I'm guessing that the methods used to render AR-10s as semi-auto are the same that differentiate the AR-15 from the M16 (re-designed bolt carrier, narrow bolt carrier channel, filled in rear lower receiver).

And an M203 would be an easy fit as well, I imagine. The sleeve that fits an M16A2 with 20" barrel should work fine, but if not, the M203A2 would work just as well with RAS kit (and I know I've seen that available for AR-10s).

I am, of course, talking out of intuition.

Heck MT,

When I get out of California I am planning to get a G-3KA4 with a quality Rail forend just so I can mount a short barreled RIS M-203 on it. Yeah it's a real hollywood combination but heck I've lived for way too long in this messed up state.

A G3 with an M203 attached? That's an ugly combo. You've been playing too much COD4

So by a PTR-91, class 3 a short barrel, slap on a 37mm flare launcher, and have a truly seless bt cool looking weapon?

yeah right.I don't play COD4.I just want a weapons system that will make a California Liberal pee their lacy little panties(and that's their guys).:D Also I've been told that way too many "fun" guns out there are not California OK.

Buy a MAC-10. They are useless, hard to aim, heavy, and unreliable... but damn are they fun to shoot!

The 9mm is far more pleasant than the .45 though, so if you want it in full auto, go 9mm.

But a G3KA4 with an M203 is a major mall ninja weapon (no offense). Plus, your going to need lots of money to pay for the Class III liscense and Destructive Device liscense you need to own these weapons.

I wish I could buy a Cobray CM203 for my Bushmaster but NY sucks and hates me. God knows what damage I could do with a FLARE gun.

Flare Launchers jus scream of Gecko45, sorry, I can see no use for actually ptting one on your AR.

Well, it just looks like an M203, which is the only reason I'd want it. It looks cool. I'm not above owning a gun for looking cool. :D

Plus, I've shot flares before, it's kind of fun. I used to own one of those really small flare guns with cap sized flares that shot up about 40ft into the air and burned out.

Well with that combination I can take the M-203 off and mount it on anything with a rail interface and with an Unmarried sear or triggerpack I can unless I am mistaken own various "uppers" so to speak and switch out the trigger pack depending on how I feel.

Well if you have LOTS of money and time to fill out forms and then use your tons of money to buy the weapons, then go ahead, no one's stopping you from buying something you think is "cool". I personally wouldn't need that kind of attachment to my rifle even if I could get it. I'd get the shotgun attachments like the remington. That would be cool.

I always thought those shotgun attachements appeared too cumbersome. Only the MASS has the easy to reach charging handle, where with the pump shotguns you have to reach out to pump the gun. I can only imagine how heavy the rifle would be once you add a 5lb shotgun under it.