In order to participate in the GunBroker Member forums, you must be logged in with your GunBroker.com account. Click the sign-in button at the top right of the forums page to get connected.
Piston Drive
AlfredJones
Member Posts: 120 ✭✭✭
OK, this is what I'm looking for, does anyone know a company that offers this type of setup?
I'm looking for an AR style rifle on the piston drive system (similar to AK) that can be bought in upper/lower pieces for .308.
I would like to have 16" flat top upper that I can setup with a red dot and 20"+ flat top that I can make into sniper/long range upper. That way I can have two different rifles, short/medium range and medium/long range, with one complete rifle and just the upper (much lighter than carrying another rifle) as an alternative.
I know Smith & Wesson has the M&P 15 with piston drive but not in the .308.
Any ideas or suggestions?
Also, you can't switch calibers by changing uppers right? The upper and lower must match for a specific caliber?
I'm looking for an AR style rifle on the piston drive system (similar to AK) that can be bought in upper/lower pieces for .308.
I would like to have 16" flat top upper that I can setup with a red dot and 20"+ flat top that I can make into sniper/long range upper. That way I can have two different rifles, short/medium range and medium/long range, with one complete rifle and just the upper (much lighter than carrying another rifle) as an alternative.
I know Smith & Wesson has the M&P 15 with piston drive but not in the .308.
Any ideas or suggestions?
Also, you can't switch calibers by changing uppers right? The upper and lower must match for a specific caliber?
Comments
There are some companies making piston "AR-10" POF and LWRC REPR are a couple examples but each run in excess of $3000.
So assuming you are using an AR-15 you CAN switch calibers by changing uppers and mags/mag adapter (depending on caliber). If you are using the "AR-10" you CAN switch calibers by changing uppers as I believe all the rounds for the "AR-10" will fit in the same mag.
In the AR's there is no caliber specific lower that I am aware of. With that said there are some companies that make lowers that will only take specific types of mags. For example Olympic Arms makes lowers that take Glock mags and the mags they are made for will only hold 9mm, .40, or .357 Sig. OA also makes/made a lower that used M1 Carbine mags. There are a couple of companies making AR lowers that only fit Grease Gun mags.
I thought it would be nice to just have the AR-10 style .308 that I could switch barrel lengths in and out (with the attatched optics) and cut down on weight but I don't want to put over $3k for just an upper and lower and then have to buy another upper.
For that price I could keep my AK, build my saiga .308 and get a S&M M&P 15 PSX in the 5.56 and have a little of everything.
Thanks for the info!
A downward bending of the AK barrel in reaction to driving a heavy piston, slide and bolt was claimed by a writer to account for the AKs' lesser accuracy.
A survival rifle set could comprise a featherweight,16" barrel, 1 in 8" twist on a flattop upper with a red dot sight, pop-up front and rear sights and a flash hider.
The long ranger can be a 20" or longer 1 in 7" twist, flattop upper with 4-12x variable scope and no mechanical sights.
Carry only one ammunition except heavy bullets for the long barrel and 55 grainers for the carbine.
Either barrel can shoot either ammunition.
The alternate barrel can be carried in a quiver or scabbard.
It has a 16" railed upper with a chromelined barrel
I also have a stainless 24" barrel tube upper.
Works for me even though it is one of those nasty gas systems.
CP
Yeah, I've seen the videos of the AK in slow motion. Anyone here have a piston driven AR that can compare accuracy with gas drive? I've heard the AK-74 is much more accurate compared to the 47. A bull barrel for the 20" might be enough to get rid of the bend.
quote:A survival rifle set could comprise a featherweight,16" barrel, 1 in 8" twist on a flattop upper with a red dot sight, pop-up front and rear sights and a flash hider.
The long ranger can be a 20" or longer 1 in 7" twist, flattop upper with 4-12x variable scope and no mechanical sights.
Carry only one ammunition except heavy bullets for the long barrel and 55 grainers for the carbine.
Either barrel can shoot either ammunition.
The alternate barrel can be carried in a quiver or scabbard.
That's exactly what I want, having a med and long range rifle in one without the weight of carrying 2 guns but I can't find it out there yet.
quote:I own a DPMS 308 system.
It has a 16" railed upper with a chromelined barrel
I also have a stainless 24" barrel tube upper.
Works for me even though it is one of those nasty gas systems.
The only gas system is my .22 semi-auto. It gets really nasty but that could be from cheap walmart ammo (winchester boxes of 550 rounds). I just bought a ruger 10/22 and have a 4x leupold red/green illum scope on it that has to be sighted in, I haven't shot it yet. I am thinking about buying some better rounds to put through it.
My problem is I want my cake and I want to eat it too. I want the reliablility/durablity of my AK in an AR form that is accurate. I've heard the MR556/MR762 (civilian HK416/HK417) is supposed to be that gun but it comes in 16.5" barrel and costs around 3k-3.5k from what little I've found on it.
They are blowback
CP