The H&K MP5K Competition AEG from Elite Force Airsoft is the newest offering for the MP5K. This SMG is completely Marui compatible and has a full polymer body. Featuring an 8.4v stick battery that inserts from the rear of the weapon, the battery compartment is designed to allow you to leave the battery in the gun and just pop off the handguard to charge the battery. A sling point is fixed to the rear of the gun for ease of use. This is a GREAT SMG for CQB usage.NOTE: this gun will only work with Elite Force MP5 Magazines.