No notch for the retainer spring - AT3 Tactical AR-15 Mil Spec Buffer Tube

This has no notch for the buffer tube retainer spring. So you have to screw the buffer tube into where it will hold down the buffer retainer. If because of the way this one works it was holding down the spring but not by enough according to my range time. Major Malfunction while shooting, the spring came out while the BCG was in the tube. This ejection, caught the BCG not allowing it to come forward. Upon examination, this buffer tube won’t allow another turn because it hits the peg and won’t allow 1 more full rotation. So you have to back it up by 1 spin. The placement holds down the retainer spring but it not enough, the vibration of shooting will set it loose in less than 5 shots.