THESE ARE INTENDED FOR THE US-MADE MODELS WHICH HAVE A 4-48 THREAD. WE HAVE A 3MM VERSION FOR THE CHINESE MODELS LISTED

This listing includes two custom breech screws and one T8 L-key as shown in the photo.

WE HAVE A SEPARATE LISTING FOR THE SCREWS WITHOUT THE TOOL AT A LOWER PRICE

 Do not over-tighten the screw, snug it down while squeezing the breech tight against the tube with your hand or a soft-jawed or padded vice. The screw should not be used to force the breech down, the combination of squeezing the breech and tube together while snugging the screw firmly is the best method to get the breech down tight while avoiding damage to the threads in the tube. 6-7 Inch lbs. or finger-tight only, no more torque than that is needed.

 These upgrade breech screws were designed by Magnum Airpower and custom-manufactured exclusively for us, they are not available from any other source. They are made of 410 stainless-steel heat treated to meet metric class 12.9 with a specified hardness of HRc 39-43. Their approximate tensile strength is 185,000 PSI. They have a T8 Torx socket and are a direct replacement for the original inner breech screw on all the models they are listed for. They are 3/16" long which is 1/16" shorter than the factory screw, it was made shorter so it doesn't stick as far down into the tube as the original which we felt was much longer than it needed to be. Crosman uses a longer screw that was readily available from an industrial supplier to avoid the expense of having a custom-length screw manufactured, that's why it was longer than it needed to be, it's what was cheap and readily available.