dd lite rail 10.0 or 9.0

[BOOSTjunkie]

i have a noveske 14.5 on the way and i want to get a dd lite rail the mount the thing. question is, how far does the 9 and 10 inch models extend? my guess is that the 9 stops just short of the gas block and the 10 goes just beyond the gas block? does anyone have any pictures of their 9 and 10 inch lite rails with noveske 14.5 and a vltor low profile gas block?

[jarel]

I'm in the same boat as you. But realized that i'm going with a 10".

I just saw my buddies 14.5" AR with the VLTOR gas block and 10" DD M4 Rail. You see maybe a 1/4" of the gas block. He said that he had put a 9" on there and it stopped before the gas block.

[bkb0000]

a 9 will cover or at least mostly cover, a 10 will completely cover. carbine gas systems are 7"... the gas port is 7.5" from the receiver face and low-pro blocks are about 1" long.

[jarel]

Are low profile gas blocks different lengths? And what is the difference with the clamp and set screw gas blocks? Just personal preference?

[bkb0000]

Are low profile gas blocks different lengths? And what is the difference with the clamp and set screw gas blocks? Just personal preference?

they're basically all the same size- an FSB block is naturally longer than the vltor/noveske types, and there's some other brands that fluctuate a bit.

set screwed block is less likely to rotate than clamp.. it could be argued two-screw clamp types are less likely to go out from losing a screw. if you use loctite and it's completely covered, you're probably not gonna have any problems with either. pinned is always best, though.

[jarel]

they're basically all the same size- an FSB block is naturally longer than the vltor/noveske types, and there's some other brands that fluctuate a bit.

set screwed block is less likely to rotate than clamp.. it could be argued two-screw clamp types are less likely to go out from losing a screw. if you use loctite and it's completely covered, you're probably not gonna have any problems with either. pinned is always best, though.

Gotcha. Thats what I figured w/ the set screw/clamp gas block, but wanted to make sure I was thinking right.

[redyak3]

Does the barrel have to have the "dimples" in order for the set screws to work?

[spamsammich]

Does the barrel have to have the "dimples" in order for the set screws to work?

No, you could use cup tip set screws. But dimples work better in conjunction with cup tips or blunt set screws. A pin and a set screw is even more secure.

[spamsammich]

OP,

I knew I saw some pics of a 10" rail and Afghan barrel somewhere. They aren't DD rails, but they give you an idea of how it will look.

http://m4carbine.net/showthread.php?t=7077

check out post #22

[Todd.K]

The 9" will come up just behind the gas block. The 10" will cover most of the gas block.