450 bushmaster is awesome! - Bushmaster .450 Bushmaster Upper Assembly w/5-Round Magazine

Was not really interested in AR platform until 450 Bushmaster was becoming popular. This upper shoots amazing with shots touching at 100 yards. Very happy with purchase! I did have an issue with shells not ejecting with any force at about 75 rounds, found the BCG had some black grease in it that was gumming things up. Took apart cleaned and oiled and all is well. I would say this is my fault, I should have cleaned it when it was new. Magazine needed a tiny bit of filing to give the shells a slightly upward cant so the first one would load easier, now works perfectly.