Originally Posted by PittTactical556
I know, after more research I realized that and never though about it, don't know why lol. Going to buy a GEN 2Extend Carbine Free Float drop in Handguard from Midwest industries.
This is a much better choice if your just looking for a easy way to put on a longer hand guard . I went the route of cutting down the factory FSB and making it a low profile gas block and went with a free float 15" hand guard on a 16" barrel .
One more thing , just be careful what you install on the hand guard that requires accuracy , if its just a flash light its fine but they do tend to shift if hit or bounced off of something .
I would not try to close the carbine length gas port hole and drill a new hole for mid length , I think your honestly looking for a disaster to happen.