I picked up a incomplete 4 position MP5 burst pack missing a few parts (sear, trigger spring seem to be the big one's I'm seeing). Getting it home and looking it up I found that these sell in the $500-700+ range I figure it might be best to get it together then sell it VS converting it to semi like I originally planned on. Anyone know a good shop that rebuilds these or where I can get parts (is the MP5 Burst pack's sear the same as the G3 or HK33's?). I've worked on alot of G3 and HK33 packs but this one is very different in many ways internally then anything I've seen so far.