No gunsmithing required to put a scope on that old Enfield No. 4 or 5. Quick detachable, Weaver-style base is machined to extremely close tolerances for precise return to zero. Attaches solidly to the receiver using the ejector and safety screws. Installation requires no bolt modification or rear sight removal. Leveling adjustments adapt mount to a wide range of receivers; windage adjustments help keep your scope reticle in the center of its range. Does not impair access to safety. Mfg: Dai Management SPECS: Aluminum, matte black. 3.9" (10cm) long.