Bill_Van

Thanks to both of you for the clarification. As soon as the weather clears up I'll give a try! Got a JP 308 Carbine on the way so I should be covered with several choices for the best configuration.

Off topic but relative to a point...... so, I purchased a Blitzkrieg and a JP .308 rifle spring and have a little concern with the spring going solid possibly causing the buffer or spring to fail per-maturely or who knows what else! Can the rifle spring run properly in a carbine extension tube? Will be on a 7.5" and 10.5" 9mm upper(s) and a M16A1 lower. My original plan was to protect the lower from the blowback battering. Also using KNS pins as additional protection. BTW, it runs like a top with a RRA 9mm buffer Spikes spacer and Wolff XP 223/9mm spring. Just want a little peace of mind for an expensive lower!