The AR Extended Magazine Release is designed to keep your focus on targets down range while easily and instinctively changing magazines. This Tacticool22 AR mag release is compatible with all variances of the AR platform, including pistols. Use it with the Ar-10, AR-15, S&W M&P 15, 15-22 and the Colt M4. Also works with all Colt, Umarex and Wather AR .22LR. Contact us if you need more information.