Griffin Armament XM Linear Comp

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Griffin Armament XM Linear Compensator with Grenade ring- Built using dimensions from the original Colt print and aesthetic geometry from an actual MAC-V-SOG XM177-E2. Manufactured from 17-4 SS, weighing 7.2 ounces per set of linear compensator and Grenade ring, the Griffin XM Linear comp is an actual functional muzzle device, not a slug of bar stock with a hole in the middle that resembles the XM Moderator.

Per NFA we built the XM Linear Comp as a linear compensator, so the baffling specific to the original part is not present and the XM Linear comp is designed new from the ground up as a functional retro muzzle device for your retro builds.

Pictured is a 12.37" barrel 16.19" non NFA pinned and welded build on a Griffin Armament XM Linear comp.

This product requires an A1 Armorers tool, Griffin Armorers tool, or thin 5/8" wrench for installation. Torque to 30-35ft lbs and visually check alignment prior to firing.

XM177E1/E2 Retro look
Functional Linear Compensator
17-4 SS Billet Machined
7.2 ounce weight
QPQ finish for original black look that won't turn brown with normal use
Blueprint specification grenade ring
4.45" OAL w/grenade ring 4.334" W/O Grenade ring

Additional Details

5.56mm (.223)
Type Of Part:
Muzzle Device
Thread Pitch:
Attachment System:

5 Reviews

  • 5

    Published by Jeff on 26th Sep 2019

    I have zero use for another one but will probably buy another one... yeah they are that nice amazing finish. Oh and it came with awesome stickers. Just order it

  • 5
    XM Linear Comp

    Published by Michael Apple on 22nd Feb 2019

    Wonderful craftsmanship, everything I had hoped for

  • 5
    High Quality

    Published by TAC69 on 10th Sep 2018

    This comp is made with attention to detail, looks awesome! Perfect piece for my XM177 tribute build.

  • 5

    Published by W Morgan on 18th Oct 2017

    Fit and finish is superb, well worth the price.

  • 5

    Published by Ken on 14th Jan 2017

    I used the XM Linear Comp To build a GAU-5A/A Car. Rifle looks and shoots great, more accurate than i would have thought with the 12.5 inch pencil barrel.
    The Car as over 400 rounds down the tube with no stoppages using 4 different 55gr loads.

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