M16 A1 5.56mm, 1:14 twist Rifle Barrel, 20" 41V50 Vanadium alloy milspec steel, fully machined and assembled with extension, chrome lined bore and chamber for optimum performance and durability, drilled gas port, phosphate finish. 1960s era M16 A1 pencil profile with M16 extension, muzzle threading 1/2 x 28, weighs 1.75 lbs. This barrel is phosphate (black in color). Barrel is not pinned for front site.
Posted by Jim on 28th Jan 2017
Used this to build a parts kit into a semi-auto Nam era looking A1 rifle. 3 inch 3 shot groups at 200 yards on a 100 yard small bore target using the A1 iron sights! Win 5.56mm 55gr ammo. Love this barrel!
Posted by paul robertson on 15th Sep 2016
The barrel arrived packaged so the UPS man would have to work at damaging it. Opened the box and workmanship was spot on. The reason for 4 stars is the description does not tell you this barrel has M4 feed ramps also the twist rate and cal are stamped on the barrel but it is under the gas tube near the chamber in the time of muti cal lowers this could be an issue. On to the good stuff head space is good with anderson bolt and the 1 in 14 twist shot PMC 55 grain ball at 100 yards 10 shot group inch and half no signs of tumble at 75 deg. this should make a nice ranch rifle . When I get 50 rounds shot I will try some hand loads i bet it will shoot under a inch.
Posted by Unknown on 31st Mar 2016
Used it for 22 conversion great barrel it works great
I would recommend it 5 stars
Posted by James M Mathews on 24th Feb 2016
Wonderful product, works great for 22 conversion unit. I have had good performance with this barrel no matter what I use it for. Five star for the barrel and the Green Mountain group. Recommend this company and their products to all.