So I'm looking for .936 adjustable gasblock, but I also want an extended length handguard / float tube. Are there any combos where I can put the gasblock under the handguard and still have access to adjust it? I was thinking to go with the JP Modual handguard and JP low profile adjustable gas block but I don't know how well this will work out. JP said it would work, but the email was really brief and I'm having my doubts. This is the barrel I will be using and I'm not sure if it is dimpled for the gas block. (Hoping it is a good one, it does not say that it is rifle cut or hand lapped, so I'm hoping I'm not making a mistake). I had ordered a custom barrel but I will probably cancel that for now. http://www.rainierarms.com/?page=shop/detail&product_id=2233