BUY ONE, GET ONE FREE – Free UP Vitrum Trigger with the purchase of an upper! That’s a $175 value!
Buy 1 UP15 or UP10 lower, Get 1 UP15 lower Free! A $225 value!
Automatically added to your cart at checkout.
BUY ONE, GET ONE FREE – Free UP Vitrum Trigger with the purchase of an upper! That’s a $175 value!
Buy 1 UP15 or UP10 lower, Get 1 UP15 lower Free! A $225 value!
Automatically added to your cart at checkout.
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
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