I have an IAB Sharps with a double trigger. The lock and trigger had been working fine, but now to lock the hammer back to the half cock or full cock position I have to set the back trigger FIRST. Didn't have to do that when I first got the rifle six months ago. I know these rifles are not high quality. My question to anyone is this............Is there another brand of reproduction Sharps that I can order a double trigger that will fit in the IAB Sharps? My thought is to get a better quality trigger. 