This is a branch of the Kabuto Trigger Usage Reset Device (TURD) that started from Fl-Eggs’ version. As I tested the
original version in di?erent rifles I ran into a number of di?erent issues, which resulted in corrective modifications
to the housing and parts, and led to this branch. Rev4 and 5 have functioned flawlessly in every rifle they’ve been
installed in, without modification or tuning, and the only purpose of Rev5 was to make them easier to build.
Modifications:
1. Spring to limit rearward travel – The original housing allowed the Hit Arm to fall too far back and
hang up on the tail of the BCG. This resulted in the bolt getting stuck rearwards. First attempts to
prevent this used a protrusion on the housing, but it ended up needing tuned for each rifle. The
spring fixes the issue without needing tuning.
2. Wire to limit forward travel – The original housing allowed the Hit Arm to swing too far forward, and
wedge under the rear of the firing pin. This resulted in the BCG not being able to move rearward.
3. Material removed from Trigger Locking Bar – On some rifles, the hammer contacts the original
Trigger Locking Bar. Results ranged from causing the BCG to bind and stick as it moves rearwards
(from the hammer applying pressure against it), to functioning properly but just feeling very rough
when cycling by hand.
4. Pin changed from 5.5mm to 5.0mm, which is easier to source.
The SendCutSend files were modified from Fl-Eggs original SCS files to change the pin size and remove material from the Trigger Locking Bar. Simply upload the three files to SCS, choose the right material for each piece (noted in the file name), and click order! I would recommend cleaning up the parts with a file or belt sander to remove burrs, and to round o? the end of the Hit Arm where it otherwise only touches your bolt carrier on the two sharp edges. You’ll need to source some 2mm pins to assemble it with; I’ve been using 2mm x 6mm 304SS pins from Aliexpress. For the housing, I have had no issues just printing it out of PLA, upside down with supports for the pin holes. For the springs, I used METALLIXITY Compression Springs (0.3x3mm OD,10mm Free Length) 10Pcs, 304 Stainless Steel Extension Spring ( https://www.amazon.com/METALLIXITY-Compression-Springs-Stainless-
Extension/dp/B0B6J1NX5H), but cut them down to about 1/2 to 2/3 length. I added a smaller hole from the back side that allows you to put some epoxy on a toothpick and apply it to the base of the spring to ensure it stays in place. The spring should stick out a small amount, but if you look from the side you won’t see it sticking out the top, so there is no risk of it getting hung on the carrier during operation. If it is sticking out a bit far, you don’t necessarily need to cut more o?, just use a pick to push it further in before epoxying. To limit forward travel, place a piece of paperclip through the holes at the front of the housing and bend the ends into the slots to keep it in place. The hit arm will rest against it in the forward position and prevent it from going past 12 o’clock.
I order stainless 5mm rod from Amazon for the main pin, any should do once you cut it to 0.438” (or slightly less).
I’m also including a couple of modified versions of the Dissident V1.1 selector in this file set. I found that it didn’t sit flush on the selector side, so I shortened it a bit, and then I added a hole that is sized to thread in a 6-32 machine screw as a reinforcement. Use a 1” long 6-32 machine screw for the normal selector, or a 1.25 for the
ambi.