Originally Posted by humboldtshooter
Just bought an Aero precision lower and am doing research on barrels and what not. My question is what is the benifit of havin the piston operated system (excuse the ignorance) or the standard recoil operated system. Any info is appreciated!!
AR is not a recoil operated design, it is a direct gas impingement system and that is the source of the major knock against it by those that favor the gas piston system.
The venting of hot gases from the barrel back into the receiver can lead to fouling, carbon build-up and heat fatigue of the metal parts. The piston design captures the gases and vents them away from the chamber and receiver areas.
On the negative side, gas piston platforms are heavier and may give up accuracy as they have a tendency to drift due to the mass of the piston shifting the center of gravity on each shot.
On a side note how do you like the Aero lower? I recently picked up an AR-10 lower by them and am impressed by the machining and finish.