MY father gave me grendel 22 mag little auto pistol.The prob is it needs a hammer .Seems a screw came loosed and let the firing pin over travel to the rear. Then the hammer struck the firing pin breaking both pin and hammer anyway i found a firing pin but cannot locate a hammer.Its a great little auto holds 30 22mags in the clip and is a great b.u.g.Any help would be great thx