Fair warning, this upper went to my first ever AR platform build. Shipping was a nightmare, but is to be expected in current political/civil atmosphere (June 2020). Went to the range and put 60 rounds through it, 0 malfunctions. Not even normal new gun feeding issues. So far I am very impressed but then again this is my first AR platform so I do not have anything to compare it to. This upper is paired with CBC BCG/charging handle and DPMS lower with Palmetto state lower build kit.