So, with a DPMS BA 12.5 barrel, and a DPMS Low profile upper receiver, what is the suggested length for a handguard? I will use a suppressor and will have an adjustable gas block. I'm 99% confident that 10" is where I will need to be, but I wanted to ask if a 12" handguard would have room to attach a suppressor and get to the front of the AGB?
Also, I need to find a gas tube. The barrel is carbine length gas, I have read to buy an Armalite tube but I can't see any products on their website. Where can I find the correct carbine gas tube?