A3 Industries Upgraded Aluminum Bolt Release Lever For Stribog Receiver. NOTE: Will not fit factory Stribog receivers. Aluminum lever is machined from 6061 aluminum then hard coated with low-gloss black anodize. Aluminum levers utilized a hardened steel bolt face insert made from machined 4340 that is black oxide coated. Aluminum levers also have a textured release for non-slip actuation. Specifications for A3 Industries Upgraded Aluminum Bolt Release Lever: Manufacturer: A3 Industries Finish: Type 3 Anodizing Fabric/Material: 7075 Aluminum Features of A3 Industries Upgraded Aluminum Bolt Release Lever Strong 7075 aluminum construction textured lever face reinforced bolt face area for long wear Package Contents: A3 Industries Upgraded Aluminum Bolt Release Lever A3 Industries BRL-002: Upgraded Aluminum Bolt Release Lever For Stribog Receiver