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A free-piston engine is a linear, 'crankless' internal combustion engine, in which the piston motion is not controlled by a crankshaft but determined by the interaction of forces from the combustion chamber gases, a rebound device (e.g., a piston in a closed cylinder) and a load device (e.g. a gas compressor or a linear alternator).
The purpose of all such piston engines is to generate power. In the free-piston engine, this power is not delivered to a crankshaft but is instead extracted through either exhaust gas pressure driving a turbine, through driving a linear load such as an air compressor for pneumatic power, or by incorporating a linear alternator directly into the pistons to produce electrical power.
The basic configuration of free-piston engines is commonly known as single piston, dual piston or opposed pistons, referring to the number of combustion cylinders. The free-piston engine is usually restricted to the two-stroke operating principle, since a power stroke is required every fore-and-aft cycle. However, a split cycle four-stroke version has been patented, GB2480461 (A) published 2011-11-23.
Lookin to sell or trade for a nice AK47 or 74. Bought it new but do not have a need for it (I have three other LWRC) shot maybe 60 rounds through it. Hands-down one of the best if not the best gas piston rifle on the market today. With full ambidextrous controls milled into the receiver...
I have question on the AK-47 gas piston. With my M14 you keep the gas piston and cylinder dry. Is it the same for AK-47 to keep it dry as well? What about the gas cylinder too?
Just using CLP to cleaning and lubing right now.
Selling my AR-15 that shoots AK-47 bullet, (7.62x39) operates with gas piston system and is non-reciprocating side charging. Gun is beautiful and is a blast to shoot. Not like any other AR at the gun range. Loaded with upgrades.
List of parts:
Gibbz Arms G4 Side Charging Upper Receiver
Selling a first gen model ruger sr556 ar 15 gas piston. Rifle has been fired less than 100 rounds. Was bought for my father to use in 2013 but he never fired it, just kept it in his closet. Rifle is in near mint condition and made better than the new ruger "takedown" model. Rare rifle ...