This quick and easy modification will work for most bolt action guns, I'm sure.
The tools that you will need are very easy to get your hands on.
1. Flat Screwdriver
2. Allen Key [To fit the screws on the bottom of the gun ]
3. Electricians Tape [ Forgot to get a picture ]
First off, what you want to do is remove the stock from the barrell assembly by simply taking out the screws that are infront and behind the magazine well, using the allen wrench.
Your setup should now look something like this.
Then, what you want to do is look for a little switch. [ In the green circle ]
This is where the flat screwdriver comes in handy. What you do is take the screwdriver, and push down on the switch until it looks like its' fallen out.
It might be very hard to push down, but just keep pushing and it will budge.
It should look like this. [ In the green oval ]
You should now easily be able to slide the bolt of the gun right out.
Now, cut off a piece of electricians tape and cut it into roughly 1/4 of its' height.
Then wrap it around the very tip of the cylinder, called the cylinder head.
Do NOT cover the hole with the tape.
What this is doing is creating a tighter fit, so that air cannot pass through, I believe.
Done like dinner. Now, you can reassemble the gun.
But there is one tricky part. There will be a wedge in the way of the bolt, when you try to put it back in. Just, take the flat screwdriver and push the wedge down flat, so that the bolt can pass.
You must slide the cylinder in, and push the wedge down simultaneously.
Don't forget to make sure that the cylinder is completely straight when going in, or it will hook on something, like mine does.
Now, just use the screwdriver to push the switch back up into the place that it first was. Again, this might be a little bit hard.
After all that, fit the bolt assembly back into the stock and put the screws in.
Remember, long screw in the back, short screw in the front.
Et voila! You're done. Wasn't that easy?
WARNING: I cannot be held responsible for any injury that one might experience during this process. I cannot be held responsible for any problems with the gun that one might experience during this process. This is for entertainment purposes only.