RTB Complete M16 Bolt Carrier Group - NICKEL BORON with 2 FREE Magpul 30 / 10 Round PMAGs1x NICKEL BORON BOLT CARRIER GROUP - 9310 - MPI M16 BCG (5.56) - POLISHEDOur Nickel Boron Bolt Carrier Group is specifically coated to allow your rifle to operate smoothly, be easily maintained, and work longer without being cleaned. We offer a 100% money back guarantee. With top quality companies that we utilize to plate our BCG's such as the UCT EXO Nickel Boron bolt carrier group, and WMD bolt carrier group, we are confident that each component that the BCG is made of will successfully work on any quality AR15 rifle. Every component, from the extractor to the firing pin, is made with exacting specifications to meet military standards and provide the best control possible. The 9310 MPI BCG is engineered to fit and work with the AR15, M4, and also as a M16 BCG.Features:Coated Inside & Out With UCT EXO NiBEnhanced 9310 Steel (Bolt)8620 Tool Steel (Carrier)Tool Steel ExtractorShrouded Firing PinMil-Spec Gas Key (4130 Steel) attached with Grade 8 hardware and Properly stakedCaliber: .223 / 5.56 / 300 BlackoutBolt is shot Peened and MPIAll BCG components pre polished before being processed and then post polished for an incredible shinePLUS!2xFREE Magpul PMAG Black AR/M4 Gen 2 5.56x45 30-Round MagazineOR2xFREE Magpul PMAG Black AR/M4 GEN M3 .223/5.56 10-Round MagazinePMAG speaks for itself as the industry leader in magazines. Magpul has simplified features without sacrificing quality and engineering standards. These 30-round and 10-round 5.56 magazines are a cost-effective upgrade from aluminum USGI design and feature several durable engineering elements such as:Impact-resistant polymer constructionA flared floorplate for positive mag extractionStainless steel, corrosion-resistant springsAn anti-tilt, self-lubricating followerPLEASE NOTE:WE WILL NOT SHIP HIGH CAPACITY MAGAZINES TO:CA,CO,CT,HI,MA,MD,NJ&NYIf; you wish to purchase the BCG by itself CLICK HERE.