I took the bolt out of a Sabre Defense AR. If how they stamp their gas key is any indication of quality control, I'd say they're good. Stamped in three spots, all cutting into the screw ensuring it doesn't come out. Colt has it in two spots. Compared it to a Bushmaster that also had two "stamps", none of which even touched the screw making me wonder what was the point of stamping in the first place? I'm sure all three ARs work well, it just come down to how "well" you need it to be.




















































