KMitch... the Ruger part is 14, the KelTec 253 ... the Ruger may have a shoulder that prevents it from slipping down, I have not checked mine and the exploded diagram I looked at looks like there a shoulder to it, my KelTec has just a pin... it connects the plastic trigger to the axis pivot that operates the trigger bar... if it slips down, the axis does not rotate far enough to release the sear, before the trigger bottoms on the frame...