I am offering an MP5K with 4 position burst pack with a DLO trigger frame, rolling sear, and all new factory internals. If you are looking for the most sought after and highly collectible HK, look no further. The NFA registered machine gun is the DLO trigger frame, and there are very few of these available. The trigger frame allows for the drop in of all new and updated factory internals, so no retimed hammer and flawless performance of 900 rpm. This gun is a safe queen and the most sought after HK NFA item. The trigger frame can be utilized for any of the three calibers offered for HK machine guns (.223, 9mm, .308). $50,000.00 o/b/o