This is an original factory replacement part. Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts. Notes:Disassembly and assembly may be required and some parts may require installation by a qualified gunsmith FeaturesThe main body is made of 6061-T6 AIRCRAFT GRADE ALUMINUMPrecision CNC machined from bulletLettering is INDEXABLE / ADJUSTABLE in positionWeight: 8.2 ouncesMil. Spec. Acid Etched (anti-glare)Mil. Spec. Anodized to give the unit a semi flat finishProfessionally Laser Engraved