GRIFFIN MARITIME RECEIVER EXTENSION (AR15, AR10, AND HEAVY DUTY OPTIONS)

Griffin Armament 7075-T6 Maritime Receiver Extension. A six position, mil-spec dimensioned receiver extension featuring 7 ports to allow excess gas, water, oil, and debris to leave the operating system, reducing pressure and associated danger to both host firearm and shooter, while enhancing reliability. Mil-spec hardcoat anodized. 7075-T6 is twice as strong as 6061-T6. Don’t put a weak 6061 receiver extension of dubious origin in your defensive firearm. The life you save might be your own.

The longer pictured Maritime Receiver Extension is for use with AR10 systems. The shorter pictured Maritime Receiver Extension is for use with AR15 style systems. The Maritime Receiver Extension pictured without the channel cut around the detent holes is the Heavy Duty MRE for AR15 use only.

Notes on Heavy Duty version: an adjustable stock needs to be pulled all the way open then slid to the desired position before closing it. While you can still adjust the stock by fully opening it again, it’s not intended to be done regularly. This functionally lets you treat the adjustable stock as a fixed-length stock for added structural stability.

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