Not anything more from IMA ya just need a Prexis receiver & a SAS bolt & striker combo + a Sten FCG & your in business & yes it bumps like a MOFO sadly I dont have a video cam or I would take some video I do have a clip of me shooting my KP44 somewhere on my computor a friend took I'll see if I can post in with that picture of my KP44 I posted a year ago here.