I have a kwa mp9 it has the full length suppressor and comes with the primary airsoft hpa m4 mag adapter Shoots 420 with the suppressor and 380 without at 120 psi you can run down to 80 but then it has problems feeding Have had it for a year it’s a great solid gun no problems just getting bored with it and I need more range for our outdoor field Message me Will trade for a hpa, or ssg or fully built the worst I can say is no