This MP5SD is a Hard Times Armory double push pin Registered receiver gun. You might say the HK MP5SD is the king of the subgun's. This one has the Rare and Highly desired Knight's Armament MP5SD suppressor, If you've ever shot a MP5SD with the KAC suppresor it is impressive, hands down the best suppressor for the MP5SD in our opinion. The gun is as close to new as you can get and as you can see in the photo's it has all the correct parts. With the double push pin lower and flapper mag release, SD cocking piece, correct 115 degree SD locking piece for the roller cams. This MP5SD and KAC mp5sd suppressor look like new only having been test fired. Don't let this set get away from you or your collection as both of these item are Rarity in todays market!