Im new to the AR platform, except for shooting my dad's as a young teen. My LGS has a Stag model 3 that I'm interested in. Any complaints about their quality or reliability? Should I spend a little more and get the gas piston version?(model 8) or another brand? (Spikes, Daniel Defense) Also, am interested in the Franklin 7.5" AR pistol. Looks like it would be fun to should and a capable HD weapon Anything bad with those?