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GM-M39 6.8 SPC II M4 Barrel

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Product Description

16" 6.8 SPC II  M4 Replacement Barrel,1:11" twist, fully machined with extension (with m4 feed ramps),  41V50 milspec, button rifled, thermo stress relieved, precision air gaged. Chromed bore and chamber for optimum performance and durability. Carbine length gas block, .750" gas block, drilled exhaust port, muzzle threaded 5/8-24, Phosphated finish, weighs 1.85 lbs. Minimum bore / groove diameters are .270" / .277".  Barrel is not pinned for front sight.


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Product Reviews

  1. Niiiiice 4 Star Review

    Posted by on 20th Sep 2016

    Nice product. We had to open the gas port hole a tad to allow more gas for our stouter spring but worked like a charm.

  2. 1 MOA out of the box 5 Star Review

    Posted by on 31st Aug 2016

    Shoots great, looks great. Groups are fantastic, I was shooting 1 MOA groups at 100 yards with ease.

  3. Excellent Barrel 5 Star Review

    Posted by on 1st Jul 2016

    With the right ammo it produces sub MOA groups.

  4. awesome product 5 Star Review

    Posted by on 31st Mar 2016

    Highly recommend groups amazing and shows great craftsmanship

  5. ... Might be better 3 Star Review

    Posted by on 12th Mar 2016

    I do not have any complaints with the barrel itself (construction, looks, weight are awesome) I would just recommend anyone looking to get into the 6.8 to go to something with a mid or rifle length gas system. Building AR15 can be tricky, 6.8's are tougher, and carbine gas systems are tougher yet. Accuracy moving to an 18" barrel is also much better.