Oh $h!t Kit Big Rig Thumb Release: What to Keep Inside

Quick answer

The Oh $h!t Kit - Big Rig Mechanical Thumb Release Edition is a rebuild kit for the mechanical thumb release on your Big Rig holster system, and it includes a small tube of blue threadlocker. Keep it stocked with the rebuild hardware plus a few spare screws and a threadlocker touch-up, so a lost part never takes your rig out of service. If you also run a thumb release IFAK kit, keep the med gear in a separate pouch so the two kits don't get mixed up.

What actually belongs in the Oh $h!t Kit

This kit's job is narrow: restore the mechanical thumb release on a Big Rig holster system. That means the rebuild hardware for the release mechanism, plus the included small tube of blue threadlocker. Blue threadlocker is the right choice here because it holds screws against vibration but still lets you break them free with hand tools when you need to service the release again.

Treat it as a dedicated hardware kit, not a general spare-parts bin. If you start dropping unrelated screws, optic plates, or med supplies into the same pouch, you lose the one thing that makes it useful: knowing that everything needed to fix the thumb release is in one place.

Should you add medical supplies to this kit?

No, and this is where the thumb release IFAK kit idea gets muddled. The Oh $h!t Kit is a holster hardware rebuild kit. An IFAK is a medical kit. Combining them means reaching past gauze and shears to find a screw, or digging through hardware while you need medical gear.

If you want an EDC trauma kit setup, build it as its own pouch with its own contents, and keep the Oh $h!t Kit in your range bag or gear drawer. Two small kits with clear jobs beat one crowded pouch every time.

How to install the rebuild without overtightening

Install the new hardware by hand first, then snug it down. Apply a small amount of the blue threadlocker to the screw threads, not to the surrounding plastic or Kydex. Overapplying threadlocker can wick into the mechanism and gum up the thumb release travel.

After assembly, cycle the thumb release several times and check that it returns cleanly. If it feels gritty or slow, back the screws off slightly and re-check. Let the threadlocker cure before you rely on the rig for a match or a range session.

When the Oh $h!t Kit is the right buy

Buy it if you already run a Big Rig holster system and you've lost a screw or want a spare on hand. It's a low-cost way to avoid a mid-draw surprise and to keep the mechanical thumb release working the way it should.

Skip it if you don't own a Big Rig or if your issue is belt attachment rather than the thumb release. In that case, look at mounting hardware like the Tek-Mount Mini w/ Tek-Lok, which is a quick-connect system with instant cant adjustment and no tools needed. Different problem, different part.

Oh $h!t Kit FAQ

Does the kit fit any holster?

It's built for the mechanical thumb release on the Big Rig holster system. It is not a universal hardware kit, so don't expect it to fit other holsters or other release designs. Match the kit to the holster before you buy.

What if I lose the threadlocker tube?

Any blue threadlocker from a hardware store works for this job. Blue is the right strength because it holds under vibration but still releases with hand tools. Keep a spare tube in your range bag.

Can I run this as my EDC trauma kit?

No. This is a holster hardware rebuild kit, not a medical kit. Build your EDC trauma kit setup separately so medical supplies aren't buried under screws and hardware. Two kits, two jobs, no confusion.

Product facts

• Oh $h!t Kit - Big Rig Mechanical Thumb Release Edition: Rebuild kit includes everything needed to restore the mechanical thumb release on a Big Rig holster system, plus a small tube of blue threadlocker. You can repair a lost or worn thumb release without hunting through parts bins, and the threadlocker helps keep the hardware from backing out.
• Tek-Mount™ Mini w/ Tek-Lok: Tek-Mount Mini w/ Tek-Lok is a compact quick-connect mounting system with instant cant adjustment and no tools needed. If your holster problem is attachment or cant rather than the thumb release, this is the part to look at instead of a rebuild kit.