It's good to see a new competitor to the manticore transformer. I like the look of the streamlined handguard compared to the oem carbine handguard that flares out halfway down. I think m-lok was the way to go and it stays in sync with cz.
The things I don't like are; the gosh darn slant at the end of the handguard robbing us of sight radius. also it's only supported/attached at the trunion which doesn't exactly spell durability compared to the oem 2 point. But hey, the ar rifle market has been getting away with it. I'm sure they designed it this way to add flexibility of barrel lengths under the standard 7.72" and the possibility of suppressor use.
I think if you're going to have a dedicated can on your scorpion, then the shortest barrel with the longest possible handguard is the way to go. It adds protection from burning your hand on a hot can and the limitation of 124/147 gr 9mm on the sub 6" barrel is a non issue since those are the most widely and economically available subsonic rounds on the market.
Personally I'm running a trilug adapter I picked up for my scorpion pistol from hkparts, so I don't have a use for a longer handguard there. I like having the ability to shoot with/without the suppressor on my evo, plus I'm sharing my can with a couple of pistols. If hb industries offered a trilug adapter, I would be all over that.
I know they just recently released their pistol barrel nut wrench adapter, but I would really like to see them come out with a carbine barrel nut socket. Steel isn't exactly their cup of tea as almost everything they make is aluminum, but I think that's what it would take to loosen the carbine nut. I am definitely adding their carbine handguard to my wishlist for my scorpion carbine despite the detractors I noted above.
HBI, keep up the great work. I truly believe you've taken the scorpion evo aftermarket parts and accessories market by storm. Awesome customer service, diversity and quality of products, low cost while striving to release newer and better products.