Alright, so HK dropped a new tank regulator, and I’ve been digging into what’s actually different about it — and whether it’s worth the extra cash. It’s called the HK Army 130/140, priced at $130 for the standard and $140 for the long version. Basically, the only physical difference is the length, which gives you a bit more reach depending on your setup. For reference, the reg it’s replacing — the Aerolite — sold for…