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Product Description

Fully assembled 300 Blackout upper receiver with M4 feed ramps, chrome-lined bore, and M-LOK Picatinny section. Weighs 3 lb 1.6 oz. Ideal for suppressor use. Made in USA.

BCM Standard 300 BLK Upper Receiver Group - 9in, MCMR-8, Standard

$831.45
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T.REX ARMS
Last Updated:
Sep 06, 2026 10:09 AM