I bought one of the gen 2 Maple leaf units a little while ago. Overall it is a very good chamber especially with the different nub options. there widest nub can actually make full contact with a MR maple leaf bucking laterally and vertically giving even pressure all over and not just down the middle of the bucking. With that said it does take a little more work to get a perfect seal compared to an Action army chamber. Ive also noticed with mine that it is very easy to accidently miss align it when installing it. But overall if your an experienced tech I would say its a top notch hop up.