How to Adjust Kydex Holster Retention Safely

By Tier 1 Concealed | Published: 2026-10-13

Category: How-to Guides

Learn how to adjust kydex holster retention with the right screw tension, test method, and safety checks so your draw stays smooth and secure.

Quick answer

Adjust retention in small quarter-turn increments on the retention screw, then test by inverting the holster and shaking gently. The holster should hold the gun securely but release it with a smooth, consistent draw. Stop as soon as the gun stays put during normal movement and draws without a hard jerk.

Why kydex retention changes over time

Kydex holsters hold a firearm through molded friction and screw tension. That tension can loosen with repeated draws, temperature changes, or debris, and it can feel too tight after a new holster breaks in or a different belt rides higher. Before touching the hardware, confirm the holster is clear of the gun, remove the firearm, and check that the retention screws are not stripped or missing. A loose screw is a safety issue, not just a comfort one.

Tools and prep before you turn a screw

Use a properly sized screwdriver or hex key. A loose-fitting tool rounds out screw heads and makes future adjustment harder. Work on a clean, well-lit surface with the holster empty. If your holster has thread-locking compound from the factory, do not force the screw; apply steady pressure and let the tool do the work. Keep small parts in a tray so washers and spacers do not roll away.

Set retention for your carry position

Retention needs differ between strong-side, appendix, and outside-the-waistband carry. A holster worn close to the body may need slightly more tension to stay put when you sit, bend, or climb. An outside-the-waistband holster used at the range can run a little looser for speed. Adjust for the position you actually carry in, not for a generic feel. Recheck after changing belts, pants, or layers.

When to stop adjusting and call for help

If the screw bottoms out and the holster still feels too loose, the shell may be worn or the wrong size for your firearm. If it feels too tight even with the screw backed out, the holster may be molded for a different model or accessory. Do not sand, heat, or bend kydex to fix retention. Contact the manufacturer or a qualified holster maker before modifying the shell.

Step-by-step retention adjustment

Clear and inspect the holster: Remove the firearm, magazine, and any light or optic accessories. Check that all retention screws, washers, and spacers are present and not stripped. Work on a clean surface with the muzzle pointed in a safe direction. Checkpoint: if a screw is missing or damaged, stop and replace the hardware before adjusting.
Mark the starting position: Use a paint pen or a small piece of tape to mark the current screw position. This gives you a reference point so you can return to the original setting if you overshoot. Checkpoint: a visible mark prevents guesswork and lets you undo a bad adjustment.
Turn the retention screw in quarter-turn increments: Tighten clockwise to increase retention or loosen counterclockwise to decrease it. Make one quarter-turn at a time, then re-test. Do not fully remove the screw unless you are replacing hardware. Common mistake: turning the screw several full rotations at once makes it hard to feel the right tension.
Test with the inverted shake method: With the gun unloaded and the holster empty of other gear, insert the firearm fully. Hold the holster upside down and shake gently. The gun should stay in place. Then draw slowly and feel for smooth release without a hard jerk. Checkpoint: if the gun falls out during a gentle shake, increase retention a quarter-turn and retest.
Confirm the draw is smooth, not loose: A proper setting holds the gun during normal movement but releases with a consistent pull. If you have to yank or wiggle the gun free, loosen a quarter-turn. If it slides out with almost no resistance, tighten a quarter-turn. Common mistake: setting retention too light for concealed carry because it feels fast at the range.
Recheck after a few days of carry: Kydex can settle slightly after the first few draws and body heat cycles. Re-test retention after a week of carry and make one final quarter-turn adjustment if needed. Checkpoint: mark the final position so you can spot future loosening at a glance.

Holsters built for repeatable retention

T1-ECHO: The T1-ECHO is a two-clip strong-side holster with a flex piece between the gun and the wing that allows the holster to move with your body. The flex piece can change how retention feels as you move, so adjust tension with the holster on your belt rather than off-body.
MSP OWB: The MSP OWB is an outside-waistband holster built with Modern Samurai Project for range use and multiple platforms with a weapon light. OWB range holsters often run slightly lighter retention than concealed carry, so tune it for fast, clean draws without losing security.