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piston drive upper
A piston is a component of reciprocating engines, reciprocating pumps, gas compressors, hydraulic cylinders 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.
If your looking for one of the best AR's made (IMO), this should be a among the list. Less than 100 rounds through it. I'll miss this one. GREAT rifle.
Description
https://www.lwrci.com/IC-A5-Rifle-556_p_239.html
No Trades, please. Transfer on buyer and can meet within 30 miles of Canby, OR...
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...
Brand New un-used and United-fired Sig Sauer 516 Gen2 14.5" Barrel Upper Receiver Assembly, Semi-Auto.
The SIG SAUER advanced short-stroke pushrod system reduces carbon fouling, excessive heat and unburned powder in the action, ensuring reliability and function that is unmatched. A standard...