I've been thinking of trying out High Power competition, hopefully with my current carbine and maybe later on with a build. I've been reading the rules and I'm fuzzy on the new handguard requirements. I've read in some places that it has to be a quad rail, others that there has to be a continuous rail at 12 o'clock with rails half the length at 3, 6, 9, and others that say M-LOK and Keymod are now acceptible. What handguards are allowed in 2018?
My carbine is a BCM middy BFH government profile 16" barrel, A2 flash hider, Midwest Industries 12" M-LOK handguard, Bravo Sopmod stock, BCM grip, Raptor charging handle, ambi safety and mag release ( I shoot left handed to match my eye dominance), Leupold 1.5-4x20 optic. Besides switching to an A2 grip, is there anything on that gun that disqualifies it from service rifle competition in 2018? Also, are QD sling swivels allowed?
Thanks in advance.