Wilson Combat AR15/M16 6.8 SPC Nickel Boron Bolt Carrier Group Nickel Boron. 8 SPC II. This robust BCG ensures rugged dependability no matter the conditions. This bolt carrier assembly features a polished nickel boron coating and is precision machined from aerospace-grade 9310 tool steel making it incredibly tough. The hardened steel 8620 carrier also features forward assist cuts for added reliability. Additionally the gas key is properly staked to ensure it won't fail at the most inopportune moment. This bolt carrier assembly is used in Wilson's fully-built rifles and will provide unbeatable performance and durability for any shooter who needs dependability they can trust. Polished nickel boron coating provides easy clean up and corrosion protection Precision machined from aerospace-grade 9310 tool steel for toughness Hardened steel 8620 carrier features forward assist cuts Properly staked gas key ensures reliable performance Drop-in fit for any quality 6.8 SPC case head based AR rifle (6.8 SPC II .224 Valkyrie) Used in Wilson's fully-built rifles for optimal performance and durability Specifications for Wilson Combat AR15/M16 6.8 SPC Nickel Boron Bolt Carrier Group: Manufacturer: Wilson Combat Color: Nickel Features of Wilson Combat AR15/M16 6.8 SPC Nickel Boron Bolt Carrier Group The polished Wilson Combat Bolt Carrier Assembly for 6.8 SPC II is the perfect solution for any shooter who needs rugged dependability in their rifle. Package Contents: Wilson Combat AR15/M16 6.8 SPC Nickel Boron Bolt Carrier Group Wilson Combat TR-BCA-NB-68: AR15/M16 6.8 SPC Nickel Boron Bolt Carrier Group Nickel Boron