Geissele Stressproof Bolt Assembly with Extractor

The Geissele Stressproof Bolt is proudly featured in our Reliability Enhanced Bolt Carrier Group. Each Forged bolt is rigorously inspected, high pressure tested, mag particle inspected and Nanoweapon coated.Compatibility:  AR15, M4Cartridge:  .223, 5.56 NATOBolt Finish:  NanoweaponExtractor Finish:  NanoweaponWeight (complete):  1.54ozWhat is Geissele Nanoweapon?Geissele Nanoweapon (also known as Picatinny DSL) is a family of Durable Solid Lubricant coatings which was developed by ARDEC. It is available exclusively from Geissele Automatics. We continued the development of Picatinny DSL so that its level of corrosion, wear and abrasion resistance is currently unmatched among firearm coatings. Nanoweapon is applied at low temperatures so that the underlying metallurgy of the part is non effected by the application process. Our coating also has a surface hardness roughly equivalent to synthetic diamond. This makes Geissele Nanoweapon harder than sand, easily rejecting carbon and making cleaning a breeze, on top of allowing the firearm to operate normally with less lubrication.PARTS INCLUDEDGeissele Stressproof Bolt (Shot Peened, High Pressure Tested, Mag Particle Inspected)ExtractorExtractor SpringExtractor O-ring and insertEjectorEjector SpringEjector Pin