The Rise Armament bolt carrier group (brand part no. RA1011NIB) is chambered for 5.56x45mm NATO and machined from 4140 steel for durable, reliable cycling in any mil-spec AR-15 upper. Finished in a nickel boron coating that reduces friction and simplifies cleanup compared to a phosphate finish, this BCG is manufactured with precision and individually inspected before it ships, so every unit meets Rise Armament’s standard for high-level performance. It’s a straightforward upgrade for AR-15 owners replacing a worn carrier group or building a dedicated upper.

Key Specifications

• Chambered for 5.56x45mm NATO.
• Machined from 4140 steel for durability under repeated cycling.
• Finished in nickel boron coating for reduced friction and easier cleaning.
• Individually inspected before shipping to ensure consistent performance.

Frequently Asked Questions

What caliber is this BCG built for? 5.56x45mm NATO.

What coating does this carrier use? A nickel boron finish for reduced friction and easier cleaning.

Buy the Rise Armament Bolt Carrier Group

Upgrade your AR-15 with a precision-inspected Rise Armament BCG. Order it from our Rise Armament lineup, part of our AR bolt carrier groups selection, and get it shipped fast from our Lubbock, Texas gun shop.