Hi there. I've been a little incognito on here for awhile, a tad out of the loop you could say. I see the 300 blk kits are going out now and that is terrific. What exactly do the kits include? I have a 7.62x39 micro pistol i would like to add a 300 blk kit for and a 16" mini upper 5.56 rifle I may need a kit for as well. Is it best to run a particular length gas system for all length barrels for this kit, or is the gas length particular to barrel length for cycling purposes? Just trying to figure out what setups I will need. Thanks.