There are a lot of parts on the market for todays most popular calibers. Some of those parts are of better quality than others, but its hard to tell from the descriptions in most catalogs whats what. So whats a guy to do when he really just wants a quality shot peened bolt that wont destroy his budget? The easy way to keep your sanity and a little change in your pocket while putting together your next favorite rifle is to shop with Wing Tactical. We only carry components from the best manufacturers in the business. The 5.56/300 Blackout Noveske Bolt Assembly is a quality shot peened bolt for the AR platform. This bolt assembly is designed and manufactured for excellent performance in 5.56, 300BLK and 22 Nosler applications. Specifications for Noveske Blackout Bolt Assembly: Manufacturer: Noveske Finish: Mil-Spec Phosphate Fabric/Material: 158 Carpenter Steel Gun Model: AR-15 Additional Features: Weight-1.52 oz Features of Noveske Blackout Bolt Assembly Shot Peened and Magnetic Particle Inspected (MPI) Mil-Spec extractor spring, black extractor insert Tool steel extractor Works with 5.56, 300BLK, and 22 Nosler Package Contents: Noveske Blackout Bolt Assembly This product is compatible with the following gun models: AR-15