The following process outlines the simple steps to installing a competition, single stage trigger in the PSE TAC series crossbows.
These triggers can be ordered in 3lb., 3.5lb. or 4lb. trigger pulls and are very crisp with no creep.
I personally use and recommend the AR-15, 3lb. Timney trigger system with the TAC 15i crossbow, but all of Timneys Triggers are excellent and have been used extensively by desiring rifle shooters for years. Once you shoot your crossbow with one of these triggers, you'll never be able to go back to a stock trigger again.
This process should take no more than about 20 minutes of your time and requires No Gunsmithing or Special Tools.
I'm including a link to a AR-15 Trigger Install Video produced by Timney. I think you may find this helpful, but please remember that it won't fully cover the TAC 15i trigger installation. This is due to the fact that the 15i is a sudo AR-15 frame, so there are some differences from an actual AR-15. They are explained in the process that follows.
Step 1 - Before attempting any installation, point the TAC 15 in a safe direction and insure it's unloaded.
Step 2A - TAC15 - You must push out the receiver pins, using a punch, nail or ice pic, so you can separate the upper and lower receivers.
Step 2B - TAC15i - On a TAC15i Step 2 is performed by removing the (6) Hex screws (3 on either side of the lower frame along the hand grip and trigger areas of the stock).
Step 3 - Back out the hand-grip Hex Screw, located inside the hand-grip. On the TAC15i this is done by first sliding the rubber hand-grip bottom plate off the base of the hand-grip to open the grip bottom. Then, using a long handled hex wrench remove the threaded hex screw that secures the handle. Once it's lose, there is a small spring and safety plunger (pin) on the side of the hand-grip, make sure you don't lose them when you take the grip off. Put these aside for reassembly later.
Step 4 - Using a thin punch or nail, if necessary, poke out the hammer and trigger pins. Save these for reassembly later.
Step 5 - Take out the "Safety Selector". Save it for reassembly later.
Step 6A - On a TAC15 the trigger assembly can now be lifted out and the receiver should be completely open and empty.
Step 6B - On a TAC15i there's a steel pin located across the top of the trigger assembly, directly over the trigger assembly. This is a uni-directional pin and must be removed using a hammer and punch. It must be punched out in the direction of the side the Safety Selector Switch is on (this is also the side that has the words "Fire" and "Safe" imprinted on the frame). Once this pin has been removed, the trigger assembly can easily be removed. This pin must be retained for re-assembly.
Note - All of the removed parts, except the trigger assembly will be needed
Step 7 - Insert the new Timney Trigger Assembly by placing it in the open receiver cavity. Insert the "Safety Selector" in the receiver and line up the receiver pin holes with the Timney Trigger pin bushings. Inset the original trigger pins through the receiver into the pin bushings and slide them in until they're flush with the sides of the receiver. (They should push in easily and feel lose, this is normal).
Step 8 - Pull the trigger while holding the hammer (to keep it from smacking the receiver or receiver pin. Using the enclosed hex wrench, tighten the hex screws in the gold colored trigger housing. You may need to use a small screwdriver to push the spring pins on the trigger aside so you can get at the hex screws in the trigger assembly. Tighten both of the hex screws, then go back and snug them once more. (Make sure these are very snug or the mounting pins could fall out).
Step 9 - Next, insert the 2 additional hex screws, enclosed in the small plastic package that came with your Timney Trigger, on top of the 2 set screws you just tightened. These two hex screws are used to lock the housing screws tightly in place.
Step 10A - Load the trigger assembly by pushing it into the cocked position.
Step 10B - On a TAC15i, after loading the trigger assembly, replace the steel frame pin located above the trigger assembly, in the receiver. Use a hammer and punch to insert this pin from the side of the frame the "Safety Selector" is located on and hammer it until it's just slightly above flush with the frame.
Step 11 - Turn the receiver up side down and reinstall the Safety Plunger, Small Spring and Hand Grip.
Step 12 - On the TAC15i, replace the (6) Hex screws (3 on either side of the lower frame along the hand grip and trigger areas of the stock).
Congratulations, your new trigger assembly is now complete and ready for use.
While you have your trigger assembly open and exposed, I would suggest it might be a good idea to also install some silencing and vibration dampening elements to quiet down the operation of the TAC 15 or 15i . I'll cover these components and steps in a separate article within this forum.
Tight groups and good shooting,