The L-key is not automatically included,  it can be selected from the drop-down menu above and added to your cart if needed.

We only stock genuine high-quality Bondhus ® T8 L-keys.

These upgrade breech screws were designed by Magnum Airpower and custom-manufactured, 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-fit replacement for the original inner breech screw on all 1377, PC77, 1322, 2289G Backpacker, 1740, 2240, 2250, 1760, 2260, 2300T, 2300S, 2300KT, 2400KT, 1300KT, Discovery & Maximus models. It's 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 also why their screw has a tiny .050 socket that rounds-out easily, it's what was cheap and readily available.

Do not over-tighten the screw, snug it down only until the breech is firmly against the tube with no wobble. If over-tightened the threads in the tube will strip first, the screw threads are much stronger. If you hold the T8 L-key by the shorter end and insert the longer end into the screw socket it's a lot harder to apply enough force to strip the threads. 

INNER BREECH SCREW LOCATION: For Discovery, Maximus, 2300 and 2400 models it's underneath the bolt, if you pull the bolt all the way back you can barely see it under there. You have to remove the rear breech screw and rear trigger frame screw to take off the rear tube plug. Then remove the bolt handle. Now you can push the bolt back far enough to expose the inner breech screw. I suggest putting a very light coat of medium strength threadlocker on the bolt handle when you put it back on. They tend to come loose otherwise, you only need to put it on finger tight, don't use a wrench, easy to damage the threads. The standard Crosman Steel Breech Kit, 13XX and many other models have the screw in the position shown in the photo.