Adjust a Trigger Pull
An experienced gunman, whether in military service or an avid hunter, knows how he prefers his weapons and what setups allow for the best use. One of these setup techniques is trigger pull, or the amount of pressure needed on the trigger in order to fire the gun. The desired trigger pull will vary depending on the user; for many experienced gunmen the default trigger pulls on manufactured weapons may be too tight. You can adjust the trigger pull on weapons, but do so with care, as guns can be delicate and dangerous tools.
1. Disassemble the gun so that you can work on the trigger without being limited by the rest of the gun. When looking at the trigger with it facing to your right, you will see three screws: the over travel screw (top right), the trigger pull screw (bottom right) and the sear engagement screw (left side).
2. Scrape away the glue that holds the screws tightly in place, using a plastic scraper. If necessary, dab a small amount of mineral spirits onto the screws with a cotton swab to loosen the glue.
3. Unscrew each of the three screws so that you can see the first three or four threads of the screws. Depending on the manufacturer and model of the gun, these can be either slotted or allen head screws.
4. Add a drop of gun oil lubricant to each of the screws and move the screws in and out of their slots a few times to ensure that they will pass safely for adjusting.
5. Unscrew the trigger pull screw until the trigger is still staying in place but it takes very little pressure to pull it backwards. If you pull it out too far, the trigger will go back on its own; you need at least a little resistance to continue. Unscrew each of the other two screws slightly so that you can adjust them as necessary.
6. Close the bolt at the top of the trigger, but do not pull the trigger or dry fire the gun. With the bolt closed, slowly turn the left hand screw until you hear and see the firing pin drop. Back this screw out about half a turn; you should now be able to wiggle the trigger with almost no effort.
7. Screw in the over travel screw (top right) slowly until you feel it barely touch the trigger. Back the screw out about quarter of a turn; this screw will now prevent the trigger from wiggling with such light pressure.
8. Turn the trigger pull screw until you have the trigger at an acceptable trigger pull setting. Cock the pin and pull the trigger a few times to check your adjustment.
9. Slam the bolt closed at least 12 times and check to see if the firing pin drops. If it does, unscrew the sear engagement screw by a quarter turn and try again, until the pin stays in place all 12 times.
10. Cock the firing pin and set the trigger to “safe” and pull the trigger. Repeat the process with the setting on “fire.” Repeat both of these actions three to four times to make sure the firing pin stays in place; if it does not, tighten the trigger pull and try again until the pin stays in place.
11. Coat each screw with at least two layers of nail polish; color and make does not matter. This will hold the screws in their places much the way the adhesive that you previously removed was working.