For sell is a HK53 registered receiver Machine Gun. This is not a Sear gun, meaning you can not take the sear out and move it. Registered receiver weapons are cheaper then sear guns and just as fun. This has a four position selector, so it has a burst option. The 53 is a 223 caliber weapon and it is short weapon with a barrel length of only 10" with the flash hider. This weapon is on a form 4 in the state of Florida and transfer to your dealer tax free. This weapon comes with one mag.