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Review: BRN-180S Gen2 300 BLK Complete Upper Receiver

Brownells new upper assembly allows you to convert your mil-spec AR-pattern pistol to 300 BLK and back.

New for 2019: Brownells BRN-180S Upper Receiver

Brownells built on its AR-180-inspired BRN-180 upper-receiver lineup in 2019 with the launch of an all-new, short-barreled model in the form of its BRN-180S.

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