Handguards for rifle +2 Gas system

[FrankieJames7]

unfortunately midwest industries does not make their free float handguards for ar10s longer than 15 inches. who makes handguards for dpms high profile style similar to midwest industries where i do not have to worry about timing the barrel nut? also, what would the minimum length to cover a gas block on a rifle +2 gas length?

[shooterrex]

Here ya go.

https://justrails.com/products/nir0xcy5ev 

I have a couple if their rails. No problems so far.