5.5" 9MM AR 15 Barrel, Modern Series (OEM)

This 9mm chambered 5.5 inch Modern Series Barrel is machined from CrMoV steel with a QPQ corrosion resistant finish and 1/2-28 x .400 full profile threads. - Designed to work with both Colt/RR and Glock style AR builds. - Compatible with standard mil-spec uppers. There are also numerous dedicated 9mm upper options that work. - Requires the use of a unique magwell conversion (Colt/Rock River style) with UZI mags or a dedicated 9mm lower with Glock mags. - 9mm on an AR15 platform operates by blowback and does not need a gas block or gas tube. - Threaded 1/2x28 instead of 1/2x36 to give you greater versatility when choosing a suppressor. - Integrated feed ramp and barrel extension. - Since the barrel extension is an integral part of the barrel, the length stated is the true overall length. For example, an 11” 9mm barrel has the same outer dimensions/length as a 10.5” 5.56 barrel. - IMPORTANT: A standard 1/2x28 flash hider will not have enough clearance for a 9mm round to pass. - Before installing a muzzle device, ensure a 9mm round will drop freely through the muzzle device bore. - You may use this barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Possession of this barrel along with a Non-NFA lower receiver is Prohibited, except when installed on a Pistol configuration firearm.