Don't give up so quickly, there is a learning curve with hammerless guns. I've experience with SK19,1; K1 , 3 of them. Most of my problems were self inflicted. You must seat the ammo in the magazine correctly, to far forward or back will jamb the mag, to loose will jamb the mag. Clearing a mag jamb takes minor disassembly. Another problem I ran into I was not paying attention to the air pressure. Running the gun down to low interrupt the cycling of the valves. I try to keep it above 100 bar. This usually happens when I try to squeeze the last couple of shots before filling with air . To drain the air I loosen 356 screw, it's under the the loading gate, good time to upgrade the loading gate. For an explanation of how the valve works watch Gregor's videos. If it's in the trigger mechanism it's beyond me, dexterity and eyes, far from a spring chicken. Kelly at Krazy Kool is a fount of knowledge, his customer service is the best, bar none. When I wanted a K1 in .177 he was able to fulfil my dreams.