450Bushmaster.net

Is there a receiver height gas block available for the 450?I have a set of Troy BUIS I want to run but they are same plane style.

You would need a gas block that will match the barrel of a 450 B and I don't recall that dimension. Can someone please enlighten us? I was interested in swapping that fake gas block on my 20" for a BUIS. So we need dimensions for both the 16" and 20".

O.D. for the barrel under the gas block on either barrel is .750 (thanks wildcatter.) I looked long and hard for a receiver height gas block to use a set of Troy Battlesights that I already had and came up short. I ended up milling off the top of a regular picatinny gas block and measuring, then milling a piece of extruded picatinny blank stock to size and using set screws/loctite to secure it. (This only worked for the fake gas block on my 20", since I cut into the gas tube area on the donor block.)

You may be better off to look into getting a quadrail to extend over a low profile gas block or just selling your receiver height Troy front sight and buying a gas block height sight to match your rear sight. I've considered both for my 16".

Take a look at the Advantage Guardian BUIS

I've been thinking long and hard about getting that myself.

Yeah,I'm thinking railed hg is the way to go.

BillytheKid wrote:Take a look at the Advantage Guardian BUIS

I've been thinking long and hard about getting that myself.

Actually, I just "pulled the trigger" and ordered it from Midway.

Ill have to take some video once I figure out how to mount it on my Thumper.

Nope, nope, nope, the barrel at the gas block for the 450b is .750"..

..t

Thanks wildcatter.The MI one will work then.

wildcatter wrote:Nope, nope, nope, the barrel at the gas block for the 450b is .750"..

..t

Woops! My mistake. Been a while since I measured mine. I'll go back and edit my previous size so it doesn't trip anyone up.