Hello everyone,
I'm highly interested in purchasing specifically the DDm4 picatinny quad rail 15inch for my S&W M&P. It has the A2 front site which I plan to remove and add a low profile gas block to. Just before I spend $395 on this rail, I just wanted to make sure it is compatible for my AR. From what I've researched it appears to be compatible but no one talks directly about this specific set up. Again I believe it is, as most but not all AR parts are universal for different brand AR's, but just wanted to throw this question out there to be sure.
My second question: the standard M&P comes with a 16inch barrel, my question is what length is the gas tube: carbine or midlength? I know it's one of the two, but I've read posts about both. I need to know this just incase I cannot remove the gas tube from the A2 site and need a new one for when I install this rail. Otherwise I plan to use the same gas tube and just add it to the low profile gas block.