This 16" medium contour barrel is manufactured from 416R Stainless Steel and uses 5R rifling with a 1 in 10 twist. Additional features include a carbine-length gas port, M4 feed ramps and 5/8" x 24 threaded muzzle. These barrels are built with .310" bore barrel blanks so they will be reliable with the available surplus and commercial 7.62x39mm Russian ammunition.
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