Buckmark halo ring

if you you are too poor(like me) to buy tandemkross charging handle for your buckmark .22lr semi auto pistol here comes the 3d printed one. at least pla+ included profile is to print pretty slow (max flow is restricted to 3mm3/s) to maximize toughness ~1,2h print time hardware needed - m3x30(cut down to ~28mm) screws and nuts x2