RACING SPORST PRO AR15 M4 A1 A2 FRONT SIGHT DUAL HEAD ADJUSTMENT TOOL .223 556 AR A1 A2 CARBINE DUAL FRONT SIGHT ADJUSTMENT TOOL with 4 & 5 Prong For Adjustment of 5-Prong A1 or 4-Prong A2 Front Sights This is Front Sight Adjust tool for AR 4 / 15 rifles and like Style sights One Piece Precision Machined Steel Part Easy Precision Elevation Adjustments for Standard 4-Prong and 5-Prong Front Posts Enhancing Shooting Accuracy