I am thinking about putting my Bushmaster on a weight reduction program and replacing my HBAR.  I want a lighter barrel, with a chrome bore/chamber and a 1/7 twist.  Bushmaster sells this barrel but only in a pre-ban configuration.  I can dremel off the bayonet lug, no problem, but what do I have to do with the threaded muzzle?  It doesn't come with a flash suppressor installed.  If I put a muzzle break on it will is pass inspection?  Does the break have to be "permanent"?  If the ban sunsets I would like to retro0fit this barrel with a suppressor.  I don't really care about the bayonet lug one way or the other.

The best option is to [b]permanently[/b] install a muzzle brake or faux flash suppressor.

Kurt Wala of KKF builds both, and does top notch work.  Talk with him (in the industry section) about it.

BTW permanently installed devices can be removed - you will have to destroy the muzzle brake to do it but the threads won't be damaged and you'll be able to put on a flash hider should the ban expire.

I second Forest's recommendation.  You can send it to Kurt and he'll cut the bayo lug off and permanently install a muzzle brake using the threads.  He'll also touch it up so you'd never know that is was a preban barrel.

You can drill and pin the break in place, that will make it "permenate" and then when the AWB sunsets you can install what ever you like and pin it in place. That's what Armilite is doing with it's post bans w/muzzle brakes now.  Talk to ya' later.  TN.Frank

If the ban sunsets, you won't be required to pin on the muzzle attachment, you can just screw it on like it was originally intended since it won't have to be permanent.