This is the full size MP5. RDTS did 110% of the work on this weapon. 4pos/3rd burst ambi lower, paddle mag, correctly remarked, and with full stock, very comfortable to shoot! Registered sear gun, so you can move the sear around to one of your other fine HK hosts! Also https://ordnancedefence.com/product/heckler-koch-mp5-9mm/