I've been accumulating parts for another MP5 build but finally got one of those HK53 flats so this has to go to get parts for that build. This has the front sling pin, rivets, weldment kit, flat, rear sight, paddle mag release, mag release, brand new RCM Bolt assy. If you have any questions, or would like additional pictures, let me know. Lower is basically an SEF but is the Indonesian type with the SUO. No demilling necessary. Ready to build. FA Trigger pack is unmodified. Asking $1600 OBO Shipped to your door. Only needs a flash hider or muzzle device and paddle mag bushing adapter. Listed in multiple forums.