20", 223 Wylde Chamber, 1:8 twist, 416 stainless steel, Fluted, honed, passivated, bead blasted matte finish, Nickel Boron extension with M4 feed ramps, and has a rifle length gas block. Weighs 2.20 lbs.
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Posted by Derald Milner on 1st Mar 2017
And the only reason I wont here is that I have only run about 100 rounds through it.
I shopped for quite a while before deciding on this barrel and am certainly not dissatisfied with my purchase. I knew it would be a shooter when first time out, just to get a few rounds down it, it held MOA at 100 yards with one particular group of 5. I load my own ammo and returned to the range with multiple 5 shot test groups built on 68 Hornady BTHP, 69 SMK and Nosler 77 BTHP. With the right powder this barrel held sub-MOA with all three bullet choices. The furthest spread in the keeper groups was .917" and this was off a bag not a sled. Also, these tests were .5 grain increments at book OAL so I expect the best is still to come.
I'll also throw in that I built a lefty and the barrel extension works flawlessly with my RRA BCG.
Great Barrel, Great Service. I would definitely recommend it.
Posted by Unknown on 21st Feb 2017
i gave this product a 4 and the reason i did i have not installed it on a rifle yet it came wrapped up and boxed in a very nice package i removed the barrel out of box for inspection it was a perfect finish on the barrel cleaned the barrel out and coated with lite lube for a future rifle build , if it shoots half as good as it looked inside and out it will be a good barrel very pleased with the looks of it, but what can i say these people have been building rifle barrels for a long time they are very well known for building superb rifle barrels.
Posted by James on 17th Feb 2017
The barrel arrived quickly and was packaged well I am not the greatest shot but on a good day I can put 5 shots inside 1 1/2 at 100 yards. This is outstanding for me !! And I have only shot 55 grain ammo. Can't wait to try a 69 or 77 grain. Great product guys !!
Posted by Mike Schmidt on 16th Jan 2017
Purchased the GM-20 for a carry varmint rifle, but I couldn't even hold 2-inches at 100 yards despite using 6 different bullet weights and 17 different loads. I called GM and talked with Morgan Shaw and he asked me to return the barrel for inspection. Turns out there was a burr on the gas port that blew out the accuracy, so GM promptly sent me a new barrel that arrived within a couple of days. I put the upper back together and went to the range to get it sighted in using a couple of standard loads I have for a different varmint upper. The new GM-20 barreled upper promptly shot 0.470" and 0.411" using a 60 gr and 55 gr bullet respectively. I sure didn't like having a defective barrel at first, but GM was totally professional in correcting the problem. I can recommend the GM-20 barrel as a very accurate medium-weight barrel and I can recommend GM based on their service before, during and after the sale. It turns out that this barrel is a great fit for my needs; it will be for you too.
Posted by Ron Apodaca on 12th Jan 2017
All GM barrels are top notch for fit,function and finish. Our 3 gunner customers love these 20" 223 Wylde barrels and they always ship in a timely matter.
Showing reviews 1-5 of 47 | Next