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1/25/2018 7:38:29 AM
Posted: 11/19/2002 1:59:50 PM EST
I would like to mount IR dual beam on the bottom and green beam on the left side.

I also want to have a mount that will leave my stock sights in place and also let me use other sighting systems.

Link Posted: 11/19/2002 2:01:03 PM EST
Bushmaster has a tri rail gas block, I have not seen any quad rail block.
Link Posted: 11/19/2002 2:02:24 PM EST

Originally Posted By SMGLee:
Bushmaster has a tri rail gas block, I have not seen any quad rail block.

I'm sure I saw it...now I have to recall where?
Link Posted: 11/19/2002 4:28:56 PM EST
I bought a quad rail block, this is the address of the one i bought:


I works great. It uses two screws for which I drilled a little into my barrel and screwed in with locktite.

These are very nice. It came from www.jdtactical.com
I believe it may be a DPMS if the web site doesn't work or you have additional questions for me, just drop me an email.
Link Posted: 11/19/2002 4:39:22 PM EST
[Last Edit: 11/19/2002 4:40:12 PM EST by CRS188]
GRS444, DPMS makes one. I have it. It is off the barrel now being replaced by a PRI. The dpms is held in place with set screws. My rule about set screws is, they don't. I don't know if lock-tite would work since the block gets so hot.....Chad
Link Posted: 11/19/2002 4:44:37 PM EST
I agree, set screws don't work. There is a big variation in the way the taper pins are drilled. BM won't sell front sites they told me even their barrels have too much variation in how far apart the holes are drilled. If you need a front site you have to send them your barrel. GGG is the same way with their flip-up front sight.
Link Posted: 11/19/2002 5:35:17 PM EST
I have a like new 4 rail gas block. If you want to purchase for a low price email me at:

Link Posted: 11/20/2002 9:23:46 AM EST
I have a quad rail gas block on a DPMS upper. I'd post a pic but the photo albums on this site are still broke. CMMG sells them for $54.95. They don't say if they're DPMS but they sure look like it.
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