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GM-M20 20" 223 Wylde Chamber

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Product Description

223 Wylde Chamber, 1:8 twist, 20" long, 416 stainless steel, weighs 2.20 lbs.,  Fluted, honed, button rifled, air gauged, stress relieved, passivated, bead blasted matte finish,  Nickel Boron extension with M4 feed ramps, and has a rifle length gas block. 

Barrel is not pinned for a front sight base.

Under "See 1 more picture" there is a detailed drawing of this barrel.

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Product Reviews

Previous | Showing reviews 6-10 of 69 | Next

  1. you cant go wrong. made $25 out sooting a savage 10 FP 308. 5 Star Review

    Posted by on 21st Jun 2018

    By far the most accurate AR I have ever shot. If you are looking at this barrel buy it you can't go wrong. Mine likes the 69 gr match king with blc2 powder. I out shot a savage 10 FP 308 at the 100 meter range. 10 shot group silver dollar size in less than a minute. I also have a Green Mountain 22lr bull barrel that will shoot quarter size groups with CCI standard velocity all day long at the 50 yard range so I purchased another and built another rifle. The second one likes the blazer ammo better. Both will shoot better than I could.

  2. Great Product 5 Star Review

    Posted by on 5th Jun 2018

    Put this barrel on an upper I built for shooting prairie dogs, did not disappoint. Accuracy was great and the weight was very good for a 20" barrel.

  3. only bright spot on a crappy rangeday 5 Star Review

    Posted by on 29th May 2018

    Bought this barrel for an AR build for my dads fathers day gift. Went to the range with 4 AR rifles and the other 3 would not settle and group but the rifle with this barrel at about 20 rounds on it went stone nasty. Im not a great shot but am anxious to see what i can do with good ammo. Had 5.56 rounds that were not firing abotu 1 out of 5 and even fighting that and some wind managed a 10 shot group of approx 1 inch when it finally settled. Very happy brght spot on a crappy ammo day. Dad has seen the target and is excited to work up some hand loads and see now nasty she can be.

  4. Quality is #1 with these barrels 5 Star Review

    Posted by on 2nd Apr 2018

    As a small custom rifle manufacturer I have used several of these barrels. Every time I am impressed by the quality of the Chamber, bore and crown. Group sizes with these barrels speak for themselves. Average group size with match grade 77 grain SMK is always less than .400 with the best ever of .047! That's one ragged hole! Green Mountain will always be my go to for great barrels at great prices. Keep up the good work guys!!

  5. This barrel was for a friend, hunting coyote medium range. 4 Star Review

    Posted by on 26th Mar 2018

    We have only had a range test and break in less than 20 rounds fired, cleaned it between rounds.

Previous | Showing reviews 6-10 of 69 | Next