8.5″ 5.56 Pistol Length 1:7 Twist Nitride Barrel

(73 customer reviews)


8.5″ Pistol Length AR Barrel in 5.56. 1:7 twist rifling. QPQ (Salt Bath Nitride / Melonite) coated barrel & extension.

Out of stock

Categories: , Tags: , ,
Additional Information
Weight1.5 lbs
Dimensions12 × 1.25 × 1.25 in

AR – 5.56 x 45 NATO

Gas Length





1:7 Twist


4140 Carbon





Gas Block Diameter


Reviews (73)

73 reviews for 8.5″ 5.56 Pistol Length 1:7 Twist Nitride Barrel

  1. Micke (verified owner)

    Perfect functioning, very accurate. Minor quibbles: Significantly overgassed and caliber wasn’t etched on it. I dremeled that on. Pistol length gas systems tend to be overgassed in general so I’m not taking a star off for that. I went up to an H3 buffer to help with the overgassed and ended up with a restrictor type adjustable gas block open just 5 clicks and that set it where Federal Gold Medal Match 77gr SMK would eject at 4 o’clock. During gas block tuning and single feeding for that testing, the barrel grouped 11 shots into 5/16″ at 25 yards. It ‘only’ grouped 1.25″ five shot group at 100 but I was using a red dot which is blurry to me due to my astigmatism – and the wind had kicked up to 15 to 30 mph and gusting – right to left. Extraordinary accuracy from a pistol barrel! Very nice barrel for an excellent price! Well done. Thank you very much, SMA!

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