Hmmm...Special Weapons, but it is actually an ICS MP5 SD6 replica, and it is not actually a custom gun and Airsoft GI has this. No need to upgrade another MP5 AEG to achieve the same capabilities... "You’re looking at the IV and probably the best generation of ICS Mp5sd6 that comes fully pre-upgraded with little more to improve. Compared to the UTG Mp5 this gun has the best bang for the buck.

Instead of spending hundreds of dollars on a UTG Mp5 to upgrade the internals and getting a metal body, the ICS Mp5 A4 comes standard with an aluminum alloy body, a new Turbo 3000 Super Torque motor, precision cut reinforced motor pinion gear and No. 1 (Bevel) gear to quiet things down (ICS is notorious for its loud motor), steel bushings that are made of a hardened silicon alloy, and low resistance 16-AWG electric wire. The ICS Mp5 SD6 also comes standard with a high capacity magazine and adjustable hop-up. Stop being an amateur and get the ICS Mp5 SD6 before even thinking about getting another airsoft replica. This airsoft gun comes with a full 30 Days warranty. All warranty work will be cover by SD based in U.S."