The other issue is that Crosman went to a weaker setup in the newer guns with the lockup pin vs. a lockup chisel detent. Yet another cost cutting measure and accuracy hurter. I think I spent about 8 bux to get the gun from a 1.5" @20 yard shooter to a sub .5" @20... absolutely ridiculous that Crosman can't spend a few dollars more to make guns that people will rave about and increase their sales. Also, I had to shim the bronze bearings for the barrel pivot to get proper tension--aka they were too thin.
There normally is an empty hole in the receiver where the old style lockup detent went. Supposedly the old parts can be switched in for better lockup, but nobody seems to know what actually holds that detent in? The only thing near that area to secure it are the stock screws...