Two Working Sides For Installation & Removal Big, tough, polyethylene block gives fitted support for installing/removing the front sight assembly on mil-spec, AR-15 rifles and carbines. Precision-machined and clearly marked on both sides for driving the mounting pins “IN“ or "OUT" of the sight. Accommodates the sling swivel, plus, includes provisions for removing the gas tube roll pin. SPECS: Polyethylene, orange. 4" (10.2cm) dia. x 1-11/16" (4.3cm) high.