Two gas blocks?

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Two gas blocks?

Postby Thumper Bandit » Wed Dec 05, 2012 11:57 pm

Does the BM have 2 gas blocks?
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Re: Two gas blocks?

Postby Al in Mi » Thu Dec 06, 2012 2:30 am

20" has two, but the front one is a dummy with no hole drilled under it. Both 16" and 20" use the same carbine length gas system
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Re: Two gas blocks?

Postby Thumper Bandit » Thu Dec 06, 2012 12:30 pm

Why on earth is there a "dummy" one?
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Re: Two gas blocks?

Postby Wicked Hunter » Thu Dec 06, 2012 3:32 pm

Its all for looks. The good news is if you need a gasblock for another project you can take the dummy off your 450 and use it.
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Re: Two gas blocks?

Postby jerdebson » Thu Dec 06, 2012 5:29 pm

If you were to modify your gas system in the future to rifle length you can use it then and use the carbine length as a port block if you turn it over.
Jerry

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Re: Two gas blocks?

Postby Texas Sheepdawg » Thu Dec 06, 2012 11:33 pm

image.jpg
Front site for 450
image.jpg (4.46 KiB) Viewed 11514 times


The dummy block is there so you could put a specific YHM flip up sight on it if you wanted BUIS. IIRC, bushmaster had it in their older catalogs, but it was pricey. FYI, I took mine off and used it on my 6.5 Grendel build and it fit perfect. Saved me about 70 bucks. The ID is .750".
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