Earlier this year I bought 3 new M&P15 rifles. They are all CT compliant and have consecutive serial numbers. Yesterday I took them to the range for the first time. I tried all varieties of ammo, both .223 and 5.56. , and Federal XM193, WWB, PMC Bronze, Wolf, etc. Also used lots of different mags - USGI Vietnam era, PMAG, C Products, Colt.
Two of the rifles ate everything up with out a hitch. I was really impressed. However, the third rifle will not feed a round. It seems that the nose of the bullet gets hung up on the teeth near the feed ramp. Here are a couple pics:
If I pull back on the bolt, sometimes the round will drop out and sometimes I have to free it by hand.
I will probably bring it back to Smith for them to evaluate, but any idea on whats going on here??