Alright, thanks for the info. I like the piston system, it just adds more weight than what I wanted. I should've saved some money and bought a DPMS Recon.
Hi guys, I just got a Sig 556 last year, and I'm kinda wanting something different. Since this gun ban craze, I can't find an AR I like for cheap. I was wondering if I could buy an AR upper to put on my Sig 556 lower?