Rail System Length Question

[Tacti-square]

Been looking at the KAC URX 4 offerings, along with the thumb rest for the top rail.

How long does your rail need to be for a true isosceles grip, with the arm fully extended and the hand wrapped around?

[GH41]

Dumb answer.... It is a personal decision we cannot make!! GH

[Breadman]

That would all depend on how long your arms are, and what length you prefer on your buttstock. I know this sounds like a smart aleck answer, but it is really the truth.

[cthompson36]

gotta agree with these guys, depends on your size

[ra2bach]

agree with above but personally, a 9" rail is the shortest I would be able to use with my style. longer is better...

[NeoNeanderthal]

for me (5 ft 11inches) a 10.5 inch rail is barely do-able. I can run 12" rails if i'm not putting my light at 12oclock and my 13.5" rail is the longest i need.

9-13.5" is the answers your gonna get most often on here. Pick up other peoples guns and see how they feel to you.

[PAWs 21]

I'm 6'3" but I can make a midlength MOE work. Longer is better. YMMV

[Dan_93SER]

I'm 6' and I can make a 9-inch handguard/rail work if I extend the buttstock out further. I prefer 12".

[Degs]

I'm 6'3" and had a midlength moe... Chopped the FSP and got a 15"... Love it

[saddlerocker]

I prefer nothing shorter than 11", but can make 9" work.

And again its not something we can tell you