Need a BCG for your next SEMI AUTO 223/5.56/300 blackout build? Pick up one of ours! These are our bolts that we use in our Match Grade Semi Auto UP15 rifles.

UP logo laser engraved
Mil-Spec BCG Machined from 8620 Aircraft Quality Steel and heat-treated to 60-61 RC
Mil-Spec Gas Key
Key Staked with Grade 8 Screws, per Mil-Spec
Mil-Spec Carpenter 158® Bolt w/ Spring and Ejector
Tool Steel Extractor w/ Spring and Viton O-ring
Mil-Spec Firing Pin w/ Chrome Finish
Mil-Spec Cam Pin
Full Auto Carrier (Backward compatible with all semi-auto rifles)
BCG Weight – 11.55 oz.

**NOTE: These are SEMI AUTO bolts, NOT bolts for our True Bolt Action AR15