Is this a factory offering from Bushmaster?
Also is there any availability on aftermarket Barrel assembly’s of different lengths?
These are our AEI ACR barrels, manufactured for us in the USA by a high end OEM barrel manufacturer to our specifications.
They are double lead lapped, air gauged, and subjected to full lab quality-control. Chrome lined, phosphated, milspec 4150CMV.
The profile duplicates the OEM BM 16" Govt. Profile barrel, but is longer overall for Canada NR status (1/4" over to avoid possible FRT scrutiny), and deletes the vestigal M203 notch forward of the gas block, as customers requested.
Different lengths are available in the marketplace, but if under 18.5" would render the rifle restricted, and would then be subject to restricted firearm requirements.