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GM-B1 17" Gunsmith edition 5.56mm 1:7

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Product Description

17" Gunsmith edition blank,  Chrome lined bore and chamber with a phoshate extension.  Made with 41V50 steel, 5.56mm, 1:7 twist.  weighs 3.00 lbs

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Product Reviews

  1. A real cost saver 5 Star Review

    Posted by on 4th Nov 2015

    These barrels are great for custom work and the price is right for keeping costs down for my customers. Because they are already chambered, l can concentrate the cosmetics and special features of my customer's choosing.

  2. Good stuff 4 Star Review

    Posted by on 11th May 2015

    Turns like butter, provided you don't try to take a <.005" cut. Finished very nicely with a 120 grit roll and scotchbrite. Chamber and bore are right on. Minimal work to produce a very accurate-for-the-money barrel.

  3. hard to beat 5 Star Review

    Posted by on 30th Apr 2015

    These half done barrels are hard to beat. Chrome lining is great. Chambers are really good. The only thing I would change is not having the step in them.

  4. Excellent barrel blank 5 Star Review

    Posted by on 14th Apr 2015

    Headspace good. All internal diameters (bore, chamber and extension) are less than .0006 run-out. Chrome is uniform through out entire chamber and bore. Very nice blank at a great price.

  5. It shoots! 5 Star Review

    Posted by on 28th Jan 2015

    Barrel headspaced perfect on no and no go gauges, turned very nice when contured and shoots well. Very happy with Green Mountian and all the barrels they produce. Thanks