Everything fit perfectly and I installed it on a real m4 shooting 556, I also purchased a socom RC2 faux suppressor with a barrel adaptor from 1/2×28 to 14mm threads, I took it to the range and everything operated flawlessly, looks like a great clone URGI !!!
Fit and finish were great except a small at the top 1913 rail section in the back like some one hit it too hard with a rubber mallet to get it off but that's OK it gives it character, I love every inch of this weapon and it looks and shoots great, thank you sixmm for such great deals I will definitely return to shop.