5.56x45mm NATO Bolt Carrier Groups

Centurion Arms AR-15 5.56 Chrome Bolt Carrier Group, Sand Rail Cut w/ Chrome E4 Bolt

Centurion Arms E4 ETB Enhanced Dual Ejector Tapered Chrome Bolt Assembly

Centurion Arms AR-15 5.56 Chrome BCG, Sand Rail Cut w/ Chrome V2 Bolt

Aero Precision AR-15 5.56/.223 Bolt Carrier Group w/ Carrier Grooves - Black Nitride

BCA Lightweight 5.56 NATO Complete AR-15 Bolt Carrier Group - Black Nitride

NBS AR-15 .223/5.56 Bolt Carrier Group - FDE PVD

BCA M16 Profile 5.56 NATO Complete Bolt Carrier Group - Black Nitride

LMT Full-Auto 5.56 Enhanced AR-15 Bolt Carrier Group

LMT Full-Auto Enhanced 5.56 Bolt Carrier

NBS .223/5.56 Bolt Carrier Group - TiN

Microbest C158 HPT/MPI 5.56 Bolt Carrier Group - Black Nitride

Microbest C158 HPT/MPI 5.56 Bolt Carrier Group - Chrome

Microbest Mil-Spec C158 HPT/MPI 5.56 Bolt Carrier Group - Phosphate/Chrome-Lined

NBS .223/5.56 Bolt Carrier Group - Blue PVD

NBS .223/5.56 Bolt Carrier Group - Chameleon

WMD Guns AR15 Bolt Carrier Group - NiB-X (Black)

Tacfire AR-15 Pistol Kit 5.56x45mm 7.5\" Barrel - PK556-LPK-7

Surefire Optimized BCG w/ Buffer & Spring

M16 Bolt Carrier Assembly

M16 Chrome Match Bolt Carrier Assembly - M16 Match Bolt Carrier W/Key

SLR Rifleworks Premium Bolt Carrier Group Titanium Nitride - 556

Sionics Weapon Systems (SWS) AR-15 Bolt Carrier Group - Phosphate

Sharps Rifle Company Xtreme Performance Bolt Nickel Boron

Rubber City Armory AR-15 5.56/.223 Bolt Carrier Group (BCG) - Black Nitride