I'm looking at doing a BCM rifle and I'm trying to decide on length. I really like the way the carbine looks but I've been told I should get mid-length for the gas system to work better. I wanted ur opinion. The other info on the gun so far is, I will be using it for plinking target practice. It will be used for SHTF but until then, just targets. I will have it chambered in 5.56 and will probably be the cheap stuff. The barrel is 1 in 7 twist.