Have you ever taken the stock off of an AR15 lower receiver and had the rear pin spring shoot out across the room? Our T15 Lower Receivers solve the problem by installing an allen wrench drive screw in the spring channel. Once you install the detent and the spring, simply screw the set screw in flush with the rear of the receiver. Switch stocks as often as you want and the lost spring problem no longer exists!

Replacement screw only, .050 allen wrench is not included.