450Bushmaster.net

anyone know the thread pattern on the 16" barrels? I've looked all over Bushmasters site with no luck.

It's a real odd ball, 5/8" x 28 pt if I remember correctly. I had ordered, I think a 5/8" x 24pt threaded break to meet NYS's ridiculous "Assault Weapons" ban, and found that it wouldn't fit. In the end I had a local gunsmith order and install a custom gentry quiet brake. Da-Mar gunsmiths in Weedsport NY did the work and it's a real nice job. They deal with Gentry quite a bit and are working on a Gentry 12 guage quiet brake which looks pretty interesting. The custom brake on my .450B was a little over $100 installed.
BD

MudBug wrote:anyone know the thread pattern on the 16" barrels? I've looked all over Bushmasters site with no luck.

From memory I believe it's a 11/16 NF

Wildcatter might be right. I remember checking it quickly and thinking it was the standard 5/8 x 24, and being wrong. It may have been the OD I had wrong, rather than the pitch. It may have been 11/16 x 24. The gunsmith may remember. I'll give him a call tomorrow.
BD

I talked with the gunsmith last night. It is 11/16"
BD

Yes the muzzle is threaded to 11/16"-24

I drilled and tapped a JP tactical compensator for my 450B

Lehigh Bullets is working on a combo flash hider/muzzle brake for the 458 socom that I think might have promise.

talonxracer wrote:Yes the muzzle is threaded to 11/16"-24

I drilled and tapped a JP tactical compensator for my 450B
[ http://i54.photobucket.com/albums/g96/talonxracer/IMG_0905.jpg ]
[ http://i54.photobucket.com/albums/g96/talonxracer/IMG_0896.jpg ]

Can you tell a difference with that comp/brake?

I have the larger version on my DPMS 300 shorty mag, it really tamed that one down.

Yep, the Tactical comp taed it right down, but she really BOOM's now! LOL

talonxracer wrote:Yep, the Tactical comp taed it right down, but she really BOOM's now! LOL

This will help with that boom. If you can afford the $2100 plus tax stamp
http://www.qsmsilencers.com/450%20bushm ... stats.html