The Expo Arms 5.56 NATO Complete Mil-Spec M16/AR-15 Bolt Carrier Group is a reliable and high-quality option for any build, specifically designed for AR-15 platform firearms chambered in .223/5.56 NATO.

Features:

• M16 cut carrier

• Chambered in .223/5.56 NATO

• Hard chrome finish

• Aircraft-quality 8620 steel carrier

• Carpenter 158 steel bolt, magnetic particle inspected

• 4130 steel gas key, properly staked grade 8 screws

• 4140 steel extractor and cam pin

• Mil-Spec O-ring and gas rings

• Hard chrome-finished 8740 steel firing pin

• Lifetime warranty

• Made in the USA