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Ok here's my first tutorial ever, as well as my first youtube video. The video does not go into all the little details, but you will get the basic idea and be able to pull this off on your own. There are simpler methods but I am primarily copying the TectT hair trigger kit which allows the shortest and lightest possible pull by being able to adjust the size of your stop pins.
YouTube - FoxZero's Cheap and Easy Hair Trigger Mod
For this mod you will need kitchen scissors, electrical tape, something to chop up pens (I used a large wire cutter), and a pile of pens awaiting their doom.
So I started off with the clicky spring mod, you should all know it. Then I added the que tip mod for a trigger stop, but instead of using a qtip I sliced open a pen and cut down the thing that holds the ink for the stop. To do this mod you stick the tip inside the spring so it stops right after the trigger activates and it eliminates the extra trigger pull. It takes some time to cut it down and get it just right, but the end result will be faster firing.
Now onto the hair trigger mod. I used electrical tape to replicate the Hair Trigger Pins kit from TectT. I found $20 a bit steep, it'd be a better deal to just buy an adjustable trigger. Any ways cut the electrical tape into multiple pieces to the width of the trigger and no more the a 16th of an inch wide. Press the trigger down and start stacking the strips above the pin where the trigger is allowed to move. The objective here is too reduce the length of trigger pull it takes to fire the gun. If you put too much on the trigger may not reset or even work at all. You want it is just before the sear trips. Note that the trigger assembles aren't all the same and electrical tape is not all the same. It may take some time, you just don't want crazy thick tape.
The next part is reducing the contact with the sear with the hammer for high rates of fire, also from the TectT kit. Press down on the sear and start stacking up electrical tape pieces about a quarter inch long on the pin the stops the sear. We want the sear as low as possible, but too low and the a5 will go into uncontrollable full auto. Either put a much as much as you are comfortable with or push it until full auto then back off a little. Be prepared to gas up your marker for test firing, but do not load paint!
Here's a pictures of what I did. Sorry the flash no longer works on my camera.
The end result here should be a super short and super light trigger pull, aka a hair trigger. For with mech triggers you'll have rapid fire capabilities when the situation calls for it, or you "snipers" won't have your aim thrown off by a hefty trigger pull. I absolutely love this mod.
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