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piston
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.
I have an excellent condition PWS MK114 Upper Receiver (14.5"). Ordered from the factory without the pinned muzzle device, so you can add one of your own choosing. I purchased this originally to build a 3-gun rifle but have only been to the range with it twice, it has mainly sat in the back of...
I have an Osprey piston kit that includes a midlength op rod and rifle op rod.
This is the Fail Zero plated version.
Only shot about 10 rounds and pulled it to change to an adjustable system.
$250
I'm considering trading my customized Mini-14 Tactical for a piston driven AR or M1A. My Mini is a 583 series tactical 16 inch barrel set into an Archangel Adjustable Precision Stock. It's had a trigger job courtesy of Northwest Custom Firearms and comes with four 30-round Gen 2 Tapco magazines...
This is a safe sitter, or safe squatter. Whichever you prefer.
Info on the upper here, although this is a midlength 16" set up. Link is 14.5. Has Samson extended rail installed.
14.5" Mid Tactical Evo Upper
Vortex flash hider installed.
Cash price is 600.
Trades welcomed are:
AK of similar...
Hey all,
Trying to hunt down one of the PWS based long stroke piston driven 6.5 grendel ar's that Alexander Arms put out in a limited edition run a few years back. I believe they called it the hunter edition, or something to that effect.
If ya have one you'd like to sell, I'll pay ya what it...
First up is an almost brand new (around 100 rounds) sig sauer 516 ar pistol. Its piston driven and fully ambidextrous. I payed 1800 for the pistol alone. Upgrades include a noveske kx3 flaming pig, vortex sparc 2 with vmx3t magnifier. Excellent setup. Had plans to sbr it but just havent done it...
SOLD:
Used Silencerco 5/8x24 Osprey and Octane Piston. Used about 60 rounds with a 300 blackout. 5/8 x 24 RH, Fits Osprey/Octane AC30.
$50 shipped CONUS. Comes in factory packaging. Funds via PayPal. Add 4% or use gift option.
Rifle has seen 50 rds. down the tube. I've added a Magpul enhanced trigger guard. This particular model comes with the chrome bcg. Ruger brand rifle carrying bag and extra grip included. Local sales only and transfer will be done at Tropics Pawn in Orchards. Buyer responsible for fee. Thank...
Price drop to $1000 cash
I have for sale or trade
A brand new Adams Arms 308 AR Rifle
DPMS Pattern
Has an adjustable gas block
Comes with Magpul furniture
Accepts .308 pmags
$1150 cash
Looking for a Glock 19
for trade, quality optics, nice 1911.. Etc
Open to others
Thanks
Milled Arsenal to...
Selling my LWRC M6A3! The rifle is in excellent condition and has had less than 100 rounds through it. When not in use it has been stored in my climate controlled safe. This is as close to brand new as you can get. It comes with original packaging which includes rifle, two 30rnd mags, and all...