This kit when fully assembled is amazing. When the stock is fully collapsed its a perfect SMG but when extended it fits comfortably as a rifle. The 12 barrel is ideal for this kit.
I've never been so impressed by by an A-5. Please note that this gun when fully assembled is 7Lbs and for some that may be heavy. But that's no issue, all other features make up for it ten fold.
Its a great kit, however please note that if you are using a hopper you will have difficulty attaching a riser or a scope to the weaver rail. Using a Tac cap fixes this problem fully.