I have a super rare (less than 5 in the country) HK MP45K chambered in 45 ACP! The receiver is genuine HK SP89 converted into 45ACP by Flemming. This gun use modified grease gun mag. This gun is properly marked HK MP45K and it has full auto bolt and flapper mag release and semi auto only trigger pack. The gun will not function 100% but one can always swap with MP5K barrel and shoot just in 9mm. Gun must ship to FFL. Please call or email for more info, thanks.