I’m selling my hi capa I’ve had for two years. The tripppe leaf spring or sear spring is out of place, I’ve tried my best to put it in right and it still sometimes shoots more than once with one trigger pull I have a Hpa adapter that comes with it The adapter is never fielded, I bought it a week ago. the mag I put on the adapter is old and the O ring doesn’t fully seal with some leaks, if you have a newer mag/ O ring it will work fine. My Kc02 one works perfect I bought at the same time ( a week ago). I believe the Hopup is not stock not sure if I replaced the stock hop up system. Missing back sight new safety and new slide catch Average wear and tear after two years to paint (Hpa TAPP info) You can find an O ring at Ace or most hardware stores for $5-10 I put really thick grease on my beat up O ring and it worked for a little while Accepting some trades Will part if worth Will fix Adpater if you pay extra $