BRT M4A1 Carrier and Key Auto - Left Hand Marked

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Full Auto Bolt Carrier and Key for the AR Family of Weapons (AR15, M16, M4)

The USGI full auto bolt carrier is Hard Chrome lined inside and Manganese Phosphate coated outside.

The Mil-Spec gas key is chrome lined, secured with mil drawing heavy splined fasteners and properly staked to ensure reliable gas system performance.

Carrier is marked "BRT" with Logo on the cam track (left hand) side. No markings visible through ejection port.

100% made in USA to current USGI M4A1 specifications.

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