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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 wall.
had it for about 5 months and ran 2 mags great shooter. This is a piston driven rifle from what I understand the upper is pretty rare. Only available on Saturdays but I am willing to deliver! Pm for more info or any questions you may have!!
$50 will go towards NWFA!!!!.
14.5 pinned and...
Howdy, I have two AUGs and one needs to go. The one for sale is standard (Steyr mags) with an extended rail. It includes one 30 round magazine (not the 42 round one pictured, sorry), a Primary Arms Glx 2x prism scope, original boxes for the rifle and optic, original tools, and manuals. No...
Title says it all. Only looking for the upper.
Gen 1 or Gen 2 doesn't matter
Looking to trade although I may throw in some $$$ if the price is right
My trades can be found here and here
two06 - 9two9 - fivefour80
If you know, you know. The PWS MK111 Mod 2 is a long stroke gas piston upper with an adjustable gas block, resulting in extreme reliability and durability, especially if running suppressed. It has around 300 rounds through it and I’m only letting it go to fund other builds. Comes with the PWS...
For Sale is a very lightly Used and very HARD TO FIND Sig Sauer AR 516 Quad Rail Factory Hand Guard in great condition! No hardware, just the hand guard. This came off of my 516 piston upper. If you have any questions, please PM me.
Cash Only. No Trades. I will ship at Buyers Expense.
I have an 18” 223 wylde BRN180 complete upper.
piston upper with captured buffer springs. Means you can run a folding stock and no buffer tube with this upper.
Around 500 rounds through upper.
Does not come with lower or red dot.
Trades I’m looking for, LVPO, Glock(9mm), gucci AR parts, body...
Up for sale is a brand new, never fired, Piston Driven POF Revolution in Burnt Bronze. I've had this rifle in a hard case (included, pictured below) for a year in a climate controlled space. It hasn't been fired and is in perfect condition - only selling because I have another kiddo on...
Like new PWS Mk216 long stroke piston AR10 with 16" barrel chambered in .308 Winchester, it has been well taken care of and has less than 40 rounds through it, there is just one minor blemish on the side of the receiver. The long stroke piston system is reliable, adjustable, and very soft...
Condition and package:
Close to new condition, total 300-400 rounds through it (tested with brass and steel cased), no problems at all.
Comes with all original parts and I can throw in a bag and the Lancer mag that came with it.
For the Samson Manufacturing Anti-Rotation handguard...
.625 gas journal size, set screw type, mid length piston. Comes with piston bushing for upper if needed. 30 rounds through this- decided to stick with all direct impingement for consistency with all my rifles.
951 442 6918
text only please.
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...
Withdrawn, you suckers lose. I'm going to keep this factory gun. GL in your search.
S&W MP15 PSX (gas piston system) NIB with one 30-round magazine (1 Magpul) . Will ship to your FFL (FFL must accept shipment from a non-FFL) for $50. Not looking for any trades at this time. Please post...
Looking to sell my low round count (20'ish) Superlative Arms piston kit in rifle length with clamp on .750" gas block and mid length with set screw .750".
Looking for $200 OBO.
You can change the op rod length to carbine/mid/pistol easily for $35. Available from Superlative Arms.
Christensen Arms CA-15 (excellent condition)
- Piston driven AR-15/ Carbon Fiber
- .223 Wylde (.223/556)
- 5 - 30 rd mags
- Christensen zipper case with 5 mag holders/ Velcro pouches with extra compartments
More info here: CA-15 Recon and G2 Rifles
Not long ago bought from a great member on...
Edit: 3/27/20: If buyer purchases my Sig 516 piston upper and my Anderson pistol lower, there will be bonus ammo included in deal, see pistol lower ad here: Anderson Lower With KAK Pistol Brace and KAK Dimpled Tube For Length Of Pull Adjustment $150
Edit: 3/19/20 price dropped to $625