Sleeper...wasn't familar with this company but this thing is great! - Jacob Grey Firearms 9mm Bolt Carrier Group (BCG)s

Honestly had not heard of this company before. I researched them and they looked like a well equipped shop with the machinery to do great work. Man, am I glad I took a chance on this thing. I am totally impressed with the quality and its perfect functioning. Its clearly well made and finished. I put his in a KE Arms KP-9 Glock magazine polymer lower build. (Standard AR trigger parts). I ran two different 9mm uppers on it. I used a mix of Glock and Brand-X Glock style magazines (Korean stuff). I ran it with six different 9mm loads both factory and reloads. 100% perfect functioning with everything I tried it with.
I would highly recommend this bolt to anyone. I can't believe other companies charge twice as much for their bolts. Perfect is perfect, paying more won't get you anything better than this.