LUTH-AR BC-A-223C FULL ASSY BOLT CARR 223 MGPHO

JP Enterprises Enhanced Bolt Assembly Completion Group .223 Remington, Black

JP Enterprises Enhanced Bolt Assembly Completion Group .308 Win, Black

JP Enterprises FMOS Full Mass Bolt Carrier Group .223 Remington, Black

Superlative Arms Full-Auto Direct Impingement Bolt Carrier, Black

Luth-AR Mil-Spec Dia Carbine Buffer Tube Complete Assembly Fits AR-15 Rifles, with Buffer, Buffer Tube, & Spring, Black 223-M-BAP

BLACK RAIN ORDINANCE AR15 223 Rem Black Nitride SPEC Series Bolt and Carrier Group (BRO-SPEC15-BCG)

DMA Inc. XTS AR-15 .223 / 5.56 Mil-Spec Bolt Carrier Group - Nickel Boron