Although it has various size tips, it guide will not fit into the receiver. If you try to force it, the tip will become wedged. I got the tip snug so it would stay in place and everything else worked well. You just cannot latch in place where the closed bolt position.
Pros: Provide good feeding without snags in receiver
Cons: Did not properly fit in receiver
This review was written in the old system and had content requirements that are different than reviews written today.