The BRN 180 Gen 3 upper receiver introduces significant updates over previous generations. Key improvements include a locking lever for the charging handle cap, a port buffer with a polymer piece to seal the action, and a non-reciprocating left-side charging handle. This Gen 3 model is compatible with any AR-15 lower receiver, such as the Colt SPR shown, and features an MLOK rail system and a four-position adjustable gas regulator, particularly noted for its utility in 300 Blackout configurations.
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