Geissele Automatics Stressproof Bolt Assembly The Stressproof bolt is machined from a forging, resulting in a much stronger and improved bolt with greater service life and reliability. Machined with extremely tight tolerances for superb gas efficiency. The extended upper rails on the carrier also provide much greater stability and dramatically increase feeding reliability. The Carrier is coated with Nanoweapon for maximum corrosion and wear resistance. Specifications Compatibility: AR15/M4 Cartridge: .223, .223 Wylde, 5.56NATO and .300 Blackout Bolt Finish: Nanoweapon Bolt Material: Carpenter 465 Extractor Finish: Nanoweapon Extractor Material: 300M Stainless Steel — Nanoweapon is a family of coatings similar to DSL (Durable Solid Lubricant) that was developed by Picatinny Arsenal (US ARMY ARDEC) and is only available exclusively from Geissele Automatics. Our engineers worked for over 3 years with the research and development company that worked with Picatinny to develop the coating in order to fine tune it into what it is today, making it the pinnacle of coatings for firearm components. No other coating on the market can provide the same level of corrosion, wear, and abrasion resistance as Nanoweapon. The coating is applied at low temperatures so it does not affect the metallurgy of the part, and has a surface hardness equivalent of 82HRC. At that hardness, it is harder than sand, easily rejecting carbon and making cleaning a breeze, on top of allowing the firearm to operate normally with less lubrication. Click here to browse our entire selection of Bolt Carrier Groups & Parts.
