Grand Power K22 X-TRIM Mk23 .22 LR Optic-Ready 10+1
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Specs at a glance
About this product
The Grand Power K22 X-TRIM Mk23 .22 LR Optic-Ready 10+1 is a rimfire pistol that borrows the aggressive slide cuts and optics-ready design from Grand Power’s X-Calibur line, but keeps the weight and recoil manageable for everyday carry and range work. It ships with adjustable fiber-optic sights, ambidextrous thumb safeties, and a two-spring system that lets you run a wider variety of .22 LR ammo without hiccups. At $649, it’s built for shooters who want a reliable, accurate rimfire gun that feels like a full-size centerfire.
| Manufacturer | Grand Power |
|---|---|
| Model | K22 X-TRIM Mk23 |
| Material | Polymer frame with steel slide (per manufacturer specs) |
| Compatibility | Grand Power Mk23 magazines, optics with RMSc footprint |
| Finish | Black nitride slide, black polymer frame |
| Weight | 21.5 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Optic-Ready Slide – Direct-mount for RMSc-footprint red dots means you can cowitness with the factory fiber-optic sights. Why it matters: Faster target acquisition and better low-light performance without sending the slide out for milling.
- Two-Spring Recoil System – Dual springs let the gun cycle reliably with standard-velocity and high-velocity .22 LR loads. Why it matters: You’re not stuck buying only CCI Mini-Mags—bulk box ammo runs cleaner here.
- Aggressive Slide Serrations + Lightening Cuts – Deep front and rear serrations plus slide cutouts reduce reciprocating mass. Why it matters: Easier one-handed manipulation and faster follow-up shots, especially with gloves or wet hands.
- Adjustable Fiber-Optic Sights – Green front, red rear. Why it matters: You can dial windage and elevation without a tool, and the fiber optics grab available light for a clear sight picture.
- Ambidextrous Thumb Safety – Swappable for lefties or righties. Why it matters: Same manual of arms as your EDC centerfire, so training transfers over without re-learning.
Who It’s For
This is for the EDC guy who wants a rimfire trainer that matches his carry gun’s controls and weight. It’s also for competitive shooters who need a reliable .22 for practice without burning centerfire ammo. If you’re a collector who appreciates the X-Calibur family’s design language, the K22 fits right in.
Pros & Cons
- Pro: Optics-ready out of the box—no extra machining cost.
- Pro: Two-spring system eats cheap bulk .22 without choking.
- Pro: Adjustable fiber sights are usable even without a dot.
- Con: Magazine capacity is 10+1, which is standard for rimfire pistols but lower than some competitors’ 15+1 options.
- Con: Holster support is limited—you may need a universal or custom kydex rig for carry.
Comparison
| Feature | Grand Power K22 X-TRIM Mk23 | Zev Technologies OZ9 .22 LR | Agency Arms AOS .22 LR |
|---|---|---|---|
| Caliber | .22 LR | .22 LR | .22 LR |
| Capacity | 10+1 | 10+1 | 10+1 |
| Optic Ready | Yes (RMSc) | Yes (RMRcc) | Yes (RMRcc) |
| Weight (unloaded) | 21.5 oz | 24.0 oz | 22.8 oz |
| MSRP | $649 | $899 | $1,299 |
| Two-Spring System | Yes | No | No |
FAQ
Is the Grand Power K22 X-TRIM Mk23 compatible with red dot sights?
Yes, the slide is cut for RMSc-footprint optics. You can mount most micro red dots like the Holosun 407K/507K or Sig Romeo Zero without an adapter plate. The factory fiber-optic sights are tall enough for a lower-third cowitness.
What magazines does this pistol use?
It uses Grand Power Mk23-specific .22 LR magazines, 10-round capacity. They’re single-stack and have a polymer basepad. Spare mags are available through Grand Power distributors.
Can I run subsonic .22 ammo in this gun?
Yes, with the two-spring system, it cycles most subsonic loads reliably. Stick to standard-velocity or high-velocity for best results—avoid hyper-velocity or wax-coated rounds if you want consistent extraction.
Is the thumb safety reversible for left-handed shooters?
Yes, the ambidextrous safety can be swapped to the opposite side with a simple drift-pin removal. The frame has detents for both positions.
Does this pistol come with a holster?
No, it ships in a lockable hard case with two magazines, a cable lock, and the manual. You’ll need to source a holster separately—I recommend a universal .22/compact frame holster or a custom kydex from a maker like Vedder or Tulster.
Final Verdict
If you want a .22 LR pistol that feels like a real EDC gun, the Grand Power K22 X-TRIM Mk23 delivers. The two-spring system is a genuine upgrade for rimfire reliability, and the optic-ready slide saves you from aftermarket machining. At $649, it undercuts the Zev and Agency options while still offering adjustable sights and ambi controls. It’s not perfect—holster options are thin and capacity is standard—but for training, plinking, or just having fun, it’s a solid choice. According to Grand Power specs, the slide is nitride-treated for corrosion resistance, and the frame is glass-filled polymer for durability. One honest drawback is the limited aftermarket support compared to Glock-pattern .22s.
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Last updated: April 2026
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