Ultimate Arms Gear Low Profile Front & Rear Iron Sight Tower Flat Top Weaver - Picatinny Mount AR15 AR-15 M16 M4 M-4 Flattop A1 A2 + Adjustment Tool 4 and 5 Prongs Package Includes: Front & Rear Sight + Sight Adjustment Tool. Precision Elevation Adjustments. "QD" Quick Detach Detachable Removable Simple Retention Thumbnut Locking. Tool is Made with Extremely High Quality Finish with All Steel Construction. A1 & A2 Front Sight Tool 4 & 5 Prong Compatible - AR15/M16. Weight (OZ): 1.3. Easy Installation , No Gunsmithing Required !