Re: How Long of Rail?
I measured my barrel when I posted and from the barrel end of the insert to the muzzle end of the gas block and it was ~13.8 inches. I read a few places that 13 inch rails (which tend to be larger than 13 inches) tend to cover the gas block. Since I don't have a complete rifle, I can't figure out exactly where the rail starts. If it starts at the end of a typical barrel nut (even though it goes farther back than that) then taking a 1/2 inch from my measurement, you end up with 13.2. Which is what Larue apparently states (thanks Oodin) as well as Spike's Tactical who said that they will be releasing a new rail that will be 13.2 inches this month that should "fit my needs". Seems at least 2 reputable manufacturers say 13.2 is enough.
Thanks.