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Trigger Return Torsion Spring Kit for a Ruger 10/22
Lighten your pull weight further with this simple kit
A simple to install kit that provides the finest trigger actuation on any factory based 10/22 Trigger Group. This kit has been designed to work with both our Full Width Trigger and our Drop-In Trigger product options. The side wall of our triggers have been specially machined to accept our trigger torsion springs. Once installed, you will have eliminated virtually all creep and pre-travel from your trigger, for the clean, crisp break we all strive to produce on any Ruger 10/22 single stage group. Used on older aluminum factory group housings and the newer plastic trigger housings, or our fully cnc'ed TriggerGroup housings, or perhaps another aftermarket single stage group/housing offered by several of the other manufacturers. Our product will further enhance their products ultimate performance.
It will not work in a Jard, nor will it work with a Timney cassette, but rather anything that is based on a factory single stage design will work.
As a side benefit, the overall pull weight is also reduced because of the nature of how a torsion spring will have very little resistance at the breaking position of the trigger. With the Torsion spring, the trigger does not "see" that energy in the spring until it is rearward in its travel, which is where you would like the extra energy to be used. The factory type spring will always have much more pressure against the trigger initially because the trigger sees all of the stored energy in a conventional coil type trigger return spring design.
Trigger Torsion Spring Kit
This kit was put together as a support kit for the R/T full width and Drop-In triggers.
Its parts allow an individual to benefit from the characteristics of a torsion style spring rather than the conventional coil type factory trigger return spring.
The removal of the trigger return plunger and coil spring opens up that cavity to become used for a trigger over-travel stop.
Here’s a list of the basic things you’ll need to complete these modifications:
-“Removable strength” thread locking compound, such as Lock-Tite 242 Blue.
-A number 21 drill bit that is “Jobber length”, or long enough to clear the trigger guard while drilling out the plunger/spring cavity to this size.
-A 10-32 standard tap with accompanying tap wrench.
-A 90 degree pic tool or similar, or something that can move the torsion spring up and over the stop screw to set the torsion spring tension once installed.
• I’d call these modifications “Intermediate”. Although they are simple and straight forward, this kit is not merely a straight “Drop-in” part, you’ll have to perform several simple drilling and tapping exercises. If you do not feel confident or comfortable doing these procedures, then as always, have a competent Gunsmith do the work for you.
Using the “Trigger Group Illustrations” diagram that is included with every “Full Width Trigger”, locate the hole position for the torsion spring stop screw.
Drill a hole in that location using a #21 drill bit, then tap that hole to 10-32 thread.
Put a small dab of thread locking compound onto the threads of the torsion spring stop screw, and install the screw until it is flush with the inside of the group housing’s inside wall.
Next, the over-travel stop set screw is really easy to install.
Wrap masking tape onto the shank of the extended length #21 drill bit so that the bit cannot mar the surface of the trigger guard while you are hand drilling the plunger/spring cavity to its new size. Using a hand drill, just drill from the trigger side of the angled cavity, keeping the same angle of the original factory return spring/plunger hole. I use just a hand held 3/8” drill for this, but you could also use fixturing and a Drill press or Mill if you wanted to.
Drill all of the way through the housing, and out the rear wall of the group housing.
Now you can tap the hole from the back side of the housing all of the way through to the front “trigger side” of the hole with a 10-32 tap and tap wrench.
Put a dab of thread locking compound onto the over-travel stop screw, and thread it into the tapped hole from the rear of the housing. Leave it a little bit shy of final adjustment protrusion length until after the Full Width trigger assembly has been installed.
Using the “Trigger Group Illustrations” page, it is easy to see how the torsion spring fits snugly onto its boss which surrounds the left side trigger pin hole on the trigger itself.
Assemble the disconnector, its pin, the sear, its spring and a temporary slave trigger pin (Included with adjustable sear kit) that is the same or slightly shorter than the overall width of the trigger. For the “Dummy” or slave pin, you can use a section of a toothpick, or a piece of a coffee stir straw, or a factory pin that has been ground shorter as necessary if you did not purchase one of our kits.
Now as an assembly, simply drop the Full Width trigger into position, then push the oversize trigger pin (supplied in both the Adjustable sear kit and the Deluxe trigger kits) through the housing, through the Full width Trigger assembly until it is in position in the housing, and of course the slave pin has been pushed out as you do this.
Once the permanent trigger pin has been installed, you can now turn the torsion spring stop set screw in until it is now flush with the outside trigger group housing wall.
I then like to use a 90 degree pic tool (Available in a set from Harbor Freight for about $4) to manipulate the leg of the torsion screw over the stop set screw to its back side, which provides the tension needed for automatic trigger re-set.
When the group has been assembled, and the sear adjustments have been made, the over-travel stop can then be adjusted.
The trick here is to minimize rearward travel while still allowing enough over-travel past let-off so that the disconnector can re-set onto the sear.
If the over-travel setting is adjusted too short, the trigger cannot re-set.
You should now be enjoying a greatly enhanced trigger pull and feel, along with a let-off that has very minimal pre-travel and virtually no creep.
ENJOY! Copyright 2007, All rights reserved
Advanced design works with any of the R/T triggers without modification to the trigger
Clean, Crisp break
Lightened pressure against the trigger reduces initial pull weight
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