Can ya'll explain the pro's & con's of these two action types?
I went through this 3 years ago when I decided to upgrade my using AR-15s from run of the mill factory Bushmasters.
The Bushmasters were OK but I wanted to upgrade the ergonomics, reliability and accuracy.
I called a friend that earns his living teaching Tier 1 SMUs how to shoot. The unit that developed and first carried the HK 416 piston gun is one of his major clients.
He told me to skip the piston guns and stay with the standard Stoner gas system.
In the world of fighting ARs it is pretty hard to find a reputable instructor with SMU experience on the piston AR that would choose one for his own use over a good DI gun.
If you are also intending to use your AR for hunting then the choice seems even clearer as the piston adds weight and decreases accuracy.
Learn to properly lube the DI AR and get one made with quality components and it will be as reliable as the ammo and mags you feed it. A piston won�t fix bad mags or ammo.
