The sear is individually numbered, and installed in a "shelf" pattern housing currently in item "B" of this lot.

Manufactured in 1987 in Germany and imported through HK Inc of Chantilly, Virginia, this item has been modified into a "MP5SD" pattern host gun for the trigger pack in item "A" of this lot. One of the most famous variants of the MP5, the integrally silenced MP5SD was one of the best combinations of firepower and signature reduction during it's period of use, and has a strong association with top tier special operations outfits like the U.S. Navy SEALs and British SAS. This example uses a threaded mounting collar at the base of the barrel for a detachable silencer instead of an integral can, but retains the barrel porting designed to start venting gas into the silencer before the bullet clears the muzzle. Features a hooded post front and four-position drum rear sights, along with model and caliber markings on top of the receiver. The receiver is the "shelf" pattern, with a functional paddle release, signature ribbed forearm, plastic trigger housing with pictographic markings that match the trigger pack, and a two-position telescoping buttstock. The bolt carrier has been professionally altered to engage the sear.

Steel and alloy construction, 12 inches in overall length, with an expansion chamber in the rear to accept the gases vented by the barrel porting and a baffle stack in the front half.