If you can't service a stacked-blowback semi you shouldn't be buying one. I bought this gun to upgrade myself from the BE Blade pump gun. Honestly the Blade is far better than the Raptor. I tried very hard keeping the Raptor in good condition before and after I played. I played about 3 times and the whole thing broke down.
Balls break like hell, even with the good kind.
I shot slower to keep them from breaking but they still broke. Do not even include the Raptor in your final selection for a gun, dont even look at it. If you want that too. I just say do not buy this gun for the expense that is being charged for it.