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11/11/2008 10:04:07 AM EDT
I tried a search and i didn't find anything :( Anyways i was wondering how to determine which size rail i need for my s&w m&p ar15. I was looking at getting the dd omega and saw there were a few different ones on their site. Thanks in advance!



i would just measure the rail myself, but i dont have the gun in front of me
11/11/2008 3:28:09 PM EDT
[#1]
If you've got an M&P15, that rifle has a carbine gas system. You need the 7" DD Omega.

You can go with a longer rail system if you replace your front sight base with a low-profile gas block, but then you will also need a rail mounted front sight.
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