This barrel is for the M10/9. It is 5-7/8″″ in length and double threaded 3/4-10 as well as 1/2-28 TPI. This barrel is ideal for situations where you want to use multiple accessories with different threads. Perhaps you want to use your old school MAC suppressor which is threaded 3/4-10 as well as your modern suppressor which is threaded 1/2-28. It is made of CrMoV MIL-B-11595 material with 6 – groove, 1:10 twist and precision air gauged with inert gas vacuum stress relieved after button rifling process. The finishing is manganese phosphate, the traditional dark gray/almost black parkerizing of the MAC series guns . These were profiled on centers to provide accuracy between bore and profile which has been a problem we’ve experienced with other manufacturers’ barrels in the past. These will fit Full and Semi Auto M10/9 guns. These are also sold with an optional thread protector.
NOTE: We do NOT recommend shooting this barrel in full auto with the 1/2-28 threads exposed due to the thinness of the barrel wall at the 1/2-28 threads. Repeated firing with exposed threads may cause the barrel wall to weaken and/or split. We recommend always using shooting this barrel with a barrel accessory, such as a thread protector, flash hider, or suppressor firmly secured to the end of the barrel.