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piston upper
A piston is a component of reciprocating engines, reciprocating pumps, gas compressors and pneumatic cylinders, among other similar mechanisms. It is the moving component that is contained by a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer force from expanding gas in the cylinder to the crankshaft via a piston rod and/or connecting rod. In a pump, the function is reversed and force is transferred from the crankshaft to the piston for the purpose of compressing or ejecting the fluid in the cylinder. In some engines, the piston also acts as a valve by covering and uncovering ports in the cylinder.
I have a like new custom LWRC 11.5” piston complete upper for sale. This started with a brand new LWRC M6IC mid-length 16” (556 NATO/1:7 twist) barrel. It was cut down to 11.5” by ADCO. The barrel was installed in an LWRC M6A2 upper receiver and quad rail. The adjustable, railed/pinned LWRC...
Complete Left-handed upper Stag arms receiver, Voodoo Melonite treated barrel 1/9 twist 16" 5.56/.223. The left-handed BCG, piston system bolt carrier group has Adams spring and POF roller Cam, Stag upper receiver, Cmmg, or early Adams Piston system I think it CMMG (It's been a long time since I...
Picked this up a few weeks back but I hate the fact I can’t put my can on it..
Never fired but here are some picks.. looks like a. I’ve build but I never used a piston AR
If I remember it has an ares piston conversion
Curious to get some input on anyone running a piston upper receiver on their AR15 suppressed.
My 11.5“ and 16” direct impingement guns sound very nice.
Never heard a piston set up other than a suppressed AK. Which was pretty loud.
Thanks!
Reno
Looking to sell or trade this Adams Arms upper. This was built by me and is unfired. Parts as follows.
1. Adams Arms kit $220.00
2. Colt SOCOM 5.56 barrel $225.00-$275.00
3. Rainier Arms upper receiver $125.00
4. Adams Arms quad rail made by Sampson $200.00
Valuing this at $775.00
Looking to...
Looking to Sell or trade my upper. Will trade for AR-15 parts , plate carriers/plates, ammo, but open to offers. Upper retails for $1k new. Price is OBO
Hi all!
If you’ve been watching, you know that Sig bailed on the 516 line, as they are want to do, and had been clearing these out for most of 2019. Unfortunately, I bought mine when they were $700. I put this on a lower, dressed it up, and placed it in the safe, where it sat, unfired.
Through...
Huldra Arms 5.45.x39 Piston upper complete . Has Adams Arms coated anti-carrier with spring release bolt. I bought the upper with 300 rds on it and put a hundred rds on it . It has some strand markings on it the barrel not sure what from. I am also willing to part this upper out if someone just...