Rail question

[EchoHotel]

I had a question about rail length, I have a colt le6920 and I am curious if i put a 15'" rail on it when i remove the flash hider will there be room for a thread on suppressor? Is the 16 inch barrel measured from the flash hider or the end of threads?

[markm]

You'll be fine with models like the M4-2000, etc.

A reflex style silencer like the SPR-M4 would be a problem.