MEDIUM STRENGTH THREADLOCKER IS RECOMMENDED TO KEEP THE THREADED PIN FROM LOOSENING. IF THE PIN COMES LOOSE IT CAN BIND AGAINST THE TUBE OR BREAK-OFF. WE USE AND RECOMMEND LOCTITE 243. THE THREADS OF BOTH PARTS SHOULD BE CLEAN AND DRY BEFORE ASSEMBLY BUT LOCTITE 243 TENDS TO WORK WELL EVEN WHEN SLIGHT AMOUNTS OF GREASE OR OIL IS PRESENT
THE THREADED STRIKER PIN CAN BE ADJUSTED UP TO 3/32" FROM THE FACE OF THE HAMMER. MORE THAN THAT CAN CAUSE THE PIN TO HIT THE VALVE DAMAGING THE BODY AROUND THE VALVE STEM. ELONGATING THE HAMMER-PIN SLOT IS NOT RECOMMENDED WITH THIS HAMMER FOR THE SAME REASON
This is the most advanced hammer design available for 13XX. It's notched, fluted, has an adjustable striker pin, thread-in cocking pin and it's made of very hard and durable 420 stainless steel. It weighs 37 grams which is slightly lighter than a standard factory hammer at 39 grams. It moves a little quicker and the adjustable striker pin pushes the valve-stem in further, a combination that produces a gain in velocity. The thread-in cocking pin eliminates rough cocking and binding that's typically caused by a loose hammer pin, that's a common problem with the factory hammers and pins. It works perfectly with standard pistol trigger groups and the two-stage group (Marauder Pistol, 1720T and 1701P version) widely sold as an upgrade for 13XX and 22XX models. The notch at the front/top of the hammer allows use of Discovery/Maximus and Crosman Custom Shop steel breeches which have the mounting screw underneath the bolt where it doesn't interfere with the pellet sliding forward. To use one of those breeches you need to drill and tap a 4-48 screw hole exactly 7/16" behind the original breech screw hole.
IT DOES NOT WORK WITH OLDER MODELS THAT HAVE A PULL-KNOB COCKING MECHANISM AND SLIDING BREECH COVER