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Tag: precision match grade bolt carrier group

Talking about my 12.5" BCM SBR build

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Parts: BCM 12.5” upper with MCMR handguard BCG: Rainier Arms np3 precision grade Charging handle: Radian Raptor LT Lower: Aero Precision M4E1 enhanced forged Trigger: BCM PNT Lower parts: Geissele...