Great upper, shoots awesome - GLFA AR-15 Complete Upper .450 Bushmaster 18in, S/S

I received the upper and a couple of days later went out to shoot it. It shot great, 2” group at 75 yards with a red dot scope. Doesn’t recoil as much as I thought it would. Well built and very light. No cycling issues using a .223 polymer mag. Had to add a sling mount stud to the fore grip, but that’s the only thing that it would have been nice to have added from GLFA.