Holster ergonomics, comfort, and fit are determined by a combination of hardware positioning, retention tuning, cant selection, and accessory configuration. Properly adjusting these elements allows a practitioner to carry a full-sized, duty-style handgun with a weapon light and optic every day without sacrificing accessibility or concealment.
Clip and Ride Height Adjustment
The vertical position of the handgun relative to the beltline — commonly called “ride height” — is one of the most impactful comfort and concealment variables. On holsters like the Sidecar, clips can be repositioned up or down along a series of mounting holes. The default position is typically set so the shooter can achieve a full firing grip on the draw, but users can move the clips to seat the pistol deeper for better concealment or higher for faster access.
On the Sidecar’s spine-side clip, the same principle applies: the clip can be mounted to different holes on the backside of the attachment, and each attachment’s clip can be moved independently to match the ride height of the holster clip on the opposite side. Ensuring both clips are at a consistent height prevents the holster from canting awkwardly inside the waistband.
Cant Adjustment
Cant refers to the forward or rearward tilt of the holstered handgun. Many T.REX holsters ship with a built-in 10-degree forward cant, which provides a balance of concealment and a natural draw stroke for most users carrying at the 3 to 5 o’clock position. On the Ironside, for example, the belt clip can be moved to alternate mounting holes to select 5 degrees forward, zero degrees, or 5 degrees of rearward cant. For appendix carry, the Sidecar’s clip system also permits cant changes by repositioning the clip to different holes on the holster body, though most appendix users run the holster relatively vertical.
The general guidance is that the default 10-degree forward cant works for roughly ninety percent of users in a strong-side configuration. Adjusting beyond that is a matter of personal preference, body shape, and draw position.
Retention Tuning
Every Kydex holster requires retention adjustment specific to the individual weapon and light combination installed. The adjustment points differ depending on whether the holster is light-compatible or not:
- Light-compatible holsters: The screw closest to the weapon light controls the primary retention click — this is what physically grabs the light body. Additional screws control friction on the slide. Tightening the top screw increases drag during the draw; tightening the bottom screw increases the positive lock on the light.
- Non-light-compatible holsters: The screw closest to the trigger guard provides the primary retention. Other screws adjust friction along the body of the slide.
Retention should be dialed in as soon as the holster arrives, tested both in the hand and while wearing the holster on a belt, because the feel differs significantly between the two. Retention settings should also be revisited every couple of months to confirm screws have not backed out.
A weapon that does not have a light attached cannot be safely retained in a holster built for a light-equipped gun. The retention geometry is precision-formed for a specific weapon-and-light combination.
Claw Adjustment
The concealment claw is a small wedge that presses against the belt to lever the grip of the handgun into the body. On the Sidecar, the claw is adjustable in two ways: the contact piece can be slid up or down to align with the belt based on the chosen ride height, and it can be extended outward for a more aggressive tuck or retracted inward for a less aggressive one. If the claw creates discomfort or excessive pressure, it can also be mounted to the rear face of the holster body, which produces a shallower engagement angle against the belt.
Belt Stiffness and Clip Sizing
A stiffer belt carries the weight of the holstered handgun more effectively and keeps the holster stable against the body. While it may seem counterintuitive, a rigid belt typically results in greater comfort because the belt distributes weight rather than allowing the holster to shift or sag. Belt clips are available in different widths — commonly 1.5-inch and 1.75-inch — and should be matched to the belt being worn for the most secure fit. Texturing on the inside face of the clip increases grip against the belt material.
Body Type and Holster Selection
Not every carry position works for every body type. The Sidecar and similar appendix holsters are optimized for front-of-body carry, but some individuals find that their build makes appendix carry uncomfortable or impractical. For those users, a strong-side holster at 3 to 5 o’clock — such as the Ironside or Ironside Hybrid — may be a better solution. The Ironside Hybrid uses an Alcantara-backed panel behind a full Kydex shell, providing cushioning against the body without the safety concerns associated with traditional hybrid holsters that use soft leather or synthetic backings prone to collapsing into the trigger guard during reholstering.
Barrel Length and Holster Stability
For sub-compact pistols with barrels around 3.5 inches, holsters are intentionally cut slightly longer than the actual barrel — approximately the length of a threaded barrel. The additional material below the muzzle provides extra leverage that stabilizes the holster during wear and draw, preventing the holster from rocking or shifting inside the waistband.
Ongoing Maintenance
Holster fit is not a set-and-forget proposition. Hardware should be checked periodically, retention re-tested, and clip positioning re-evaluated if carry conditions change — whether due to seasonal clothing differences, belt changes, or transitioning to a different handgun or light configuration.