[24] Since the evacuator was positioned lower over the gun's barrel US M68 guns had been fitted using an eccentric bore evacuator rather than a concentric design so that you can give more clearance more than the rear deck.[twenty five] The next generation had Improved evening-preventing abilities and typically nuclear, https://hoytmachineguns.com/product/new-in-box-factory-colt-m16a2-model-r0977-m4-carbine-safe-semi-auto/