This barrel is for the M11/NINE 9mm. It is 4.5″ in length and threaded 1/2-28 TPI – it’s also known commonly as a Stubby Barrel”. This barrel is ideal for your suppressor or other barrel accessory threaded 1/2 x 28. It’s also the perfect barrel for your M11/9 or M11A1 CFW bolt in 9mm. 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 M11/NINE 9mm guns. These are also sold with an optional thread protector.
NOTE: We do NOT recommend shooting this barrel 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 .