Mid-length Dissipator AR: does anyone make one?


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MatthewVanitas
February 23, 2006, 10:23 PM
Does anyone know of a manufacturer who makes a Dissipator-type barrel which has the gas block in the midlength, vice CAR, position?

For those unfamiliar, the Dissipator is a 16" with full-length handguards and front-sight in the 20" position (so right behind the muzzle on the 16" barrel), and usually a gas block under the handguards at the CAR position.

I know that some folks make Dissipators with rifle-length gas systems, and do some tweaking to make them work, but I'm not terribly thrilled with that idea.

It's a bit late for me to ask now, as I already bought a Bushmaster Dissipator upper, A1 sights, M4-profile barrel.

It just seems that the Dissy would be a great place to apply the mid-length concept, but with even better sight radius and full furniture compatibility with the 20" rifles. Thanks for any info,

-MV

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Bartholomew Roberts
February 24, 2006, 12:51 AM
The only way I know to do that is to use a low profile gas block underneath a rail system and then mount a front sight to the rail. The Larue 13.2" rail would put a front sight at the same distance as a rifle.

Matt-man
February 24, 2006, 04:20 AM
Does anyone know of a manufacturer who makes a Dissipator-type barrel which has the gas block in the midlength, vice CAR, position?

CMMG (http://www.cmmginc.com/) builds uppers configured exactly like that. The M10M setup is what you want.

MatthewVanitas
February 24, 2006, 04:41 AM
CMMG (http://www.cmmginc.com/) builds uppers configured exactly like that. The M10M setup is what you want.

Hot dang, you're right.

I'd glanced at their page before, but only saw the M10C (which is CAR-gas Dissy). Now I see they have 10M and 10R (Dissy mid and rifle gas)

I wonder how their medium-contour barrel compares in weight to my M4-profile barrel, and whether it can be fluted.

And they have the A1 option too...

If I could get it in a weight similar to my current upper, I might have to look into upgrading down the road. Plus then I'd have a 1:7 twist. And it's only about $100 more than the Bushmaster version.

Life is full of choices...

-MV

Correia
February 24, 2006, 11:55 AM
Bart, which low profile gas block do you like the best?

Bartholomew Roberts
February 24, 2006, 12:33 PM
I don't really have enough knowledge to comment as the only one I have seen firsthand is the Larue. FWIW, the Larue looks pretty good though. It fits under the DD rail which is closer on the sides than most other rails, so it should fit under just about any commerical rail offered out there.

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