Kabuto Instructions and Troubleshooting
Please read all of this article
This device functions similarly to the Hoffman Tactical Super Safety but does NOT require any trigger cut and utilizes a standard AR safety switch.
You will need a full-auto spec BCG! I recommend this one, but any that is full-auto spec will work. The device will not function with a semi spec BCG. We recommend this BCG for AR9's.
This device is confirmed to work with Milspec triggers as well as Geissele and Larue
The included safety still functions as a normal safety if the drop in device is removed so there is no need for disassembly after the selector is installed.
For the AR15 variant, you will need at least an H2, more the likely an H3 buffer. We recommend any of these buffers.
For the AR9 variant, you will need a 10+oz deadblow buffer and you will need to remove the BCG weight that is added to the back of the BCG. Here is the link for the Blowback 9 FRT tuning guide. This is a very extensive guide that should answer almost all you AR9 questions!
Installation
This device does have a break-in period and may require some tuning. Every firearm is different even in the slightest ways because of various tolerances. Please check the troubleshooting section below for tuning instructions.
Your kit will include your Kabuto device and your selector (material differs based on the option you chose)
First, remove your pistol grip and old safety selector.
For Nylon Selectors: Simply install like normal and reinstall your pistol grip
For Metal Selectors: Remove the screw from the right side of the selector. Pop off the lever by pushing it to the rear. Insert into the safety position on the lower and reinstall the plunger and pistol grip. Slide the lever back on to the right side of the lower. Screw the screw in all the way.
We have designated the 2 most common lower cuts as the "AR-15 cut" (left) and the "M16 cut" (right) shown below.
The Kabuto drops right in to the AR-15 cut lower without the need for a spacer. After the safety selector is installed, simply drop the device in, press the lever forwards against the hammer and close the lower.
If you have the M16 cut lower (almost all PSA lowers are this) you will need to install the provided spacer. (Not needed for the metal housings) Simply remove the protective film from the adhesive and press into the right side if the device (right side: in relation to how it is installed in the lower) See photos below.
Other than the spacer, the installation is the same.
AR9 Variation:
The only difference between installation of the AR-15 Kabuto and the AR-9 Kabuto is the AR-9 will need the BCG weight removed to function.
Troubleshooting
The most common issue people run into is bolt binding. This is almost always caused by the device not being oiled, or not being tunes correctly.
To tune the Kabuto to your setup, simply remove the device, pop out the pin, and grab your plunger. Using a file or sandpaper, slowly take materil off the foot of the plunger, pictured below. Follow this video as well for clarification.
Only remove a small amount at a time, removing too much will cause the device to not be able to function.
After removing a little, reassemble and dry fire test in your firearm.
Once you get it to actuate consistently and fully, we recommend a string of live fire to mesh the device with your firearm. This will allow the devie to function the smoothest it can.
If your trigger pull is abnormally heavy, this means more material needs to be shaved off. Remember, only remove a little at a time.
For any questions, comments, or concerns, please reach out to use at walker@textacdesigns.com
We will be happy to answer any questions or replace any parts needed.