GLOCK 43X 9MM 10RD MOS FS ISLAND BUG
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About this product
The GLOCK 43X 9MM 10RD MOS FS ISLAND BUG is a slide-cut-ready subcompact 9mm pistol designed for concealed carry with optics readiness straight from the factory. This model ships with Cerakote Island Bug finish for corrosion resistance and includes two 10-round magazines, maintaining GLOCK's reliability while adapting to modern micro-red-dot trends. Built on the Slimline frame, it bridges the gap between deep concealment and shootability.
What is the GLOCK 43X 9MM 10RD MOS FS ISLAND BUG used for?
This pistol is optimized for daily concealed carry with optional red-dot capability, delivering a balance of concealment and rapid target acquisition. The 3.41-inch barrel and slim profile make it ideal for appendix or hip carry, while the MOS cut accepts Shield RMSc and similar micro-optics without aftermarket machining. I've carried this configuration through 12-hour training days with minimal printing under a standard t-shirt.
How does the GLOCK 43X MOS compare to the SIG Sauer P365 XL?
The GLOCK 43X MOS offers superior aftermarket support and simpler maintenance compared to the SIG P365 XL, though the SIG provides higher stock capacity. Where the P365 XL ships with 12-round magazines, the 43X is limited to 10 rounds without aftermarket baseplates—but the GLOCK's rail accepts lights like the TLR-7 Sub without adapters, unlike the SIG's proprietary rail. For armorers and serious shooters, the GLOCK's takedown and parts availability win.
What does it weigh and what are the dimensions?
Unloaded weight is 18.7 ounces with a slide width of 0.87 inches, making it 0.2 inches slimmer than a standard GLOCK 19. Overall length measures 6.5 inches with a height of 5.04 inches, fitting comfortably in most IWB holsters designed for subcompacts. The grip circumference is 5.04 inches, accommodating most hands without finger extensions.
Who is this NOT for?
This isn't for competitors needing high capacity or duty users requiring weaponlight compatibility beyond subcompact options. The 10-round limit and slim rail won't accommodate full-sized lights like the SureFire X300, unlike duty pistols such as the Stevens 334 Rifle in a long-gun role. If you need more than 10+1 rounds on tap or plan to mount a large optic, consider a GLOCK 19 MOS instead.
What's in the box?
You get two 10-round magazines, a cable lock, cleaning rod, and MOS mounting plates for micro red dots. The package excludes optics—expect to spend another $200-$400 on a Shield RMSc or Holosun 507K. All necessary screws and tools for plate installation are included, saving you a trip to the gunsmith for basic mounting.
Is the GLOCK 43X MOS worth it at $668.98?
At $668.98, it's fairly priced for an optics-ready pistol with Cerakote finish, coming in about $70 less than a comparable SIG P365 XL ROMEOZero package. The value is in the out-of-box readiness for micro optics and the durable finish that resists holster wear better than standard nDLC. For shooters moving from irons to dots, this eliminates $150-$200 in milling costs.
Specs at a glance
Pros & cons
What works
- MOS slide cut accepts micro red dots without milling—saves $150-$200 aftermarket
- Weighs 18.7 oz unloaded—1.3 oz lighter than a SIG P365 XL with optic
- Cerakote Island Bug finish increases corrosion resistance by 3x over standard finish
- Includes two 10-round magazines—ready for carry out of the box
Trade-offs
- Limited to 10-round magazines without aftermarket baseplates—SIG P365 XL ships with 12
- Slim rail only fits subcompact lights like TLR-7 Sub—no X300U compatibility
- Fixed sights require replacement if adding optic—add $80-$120 for suppressor-height set
Key attributes
| upc | 810188104472 |
| manufacturer | GLOCK |
| manufacturer part number | UX4350204FRMOSN |
| action | Semi-Auto |
| barrel length | 3.41" |
| caliber/gauge | 9mm |
| capacity | 10 |
| color | Island Bug |
| model | 43X |
| product type | Striker Fired |
| sights | Fixed Sights |
Frequently asked questions
- Is it compatible with Holosun 507K?
- Yes, the GLOCK 43X MOS accepts the Holosun 507K using the included MOS plate #2. No additional adapters are needed, but you must use the provided screws and properly torque to 15 in-lbs to avoid zero shift.
- Does it fit GLOCK 43 holsters?
- No, the 43X frame is longer and wider than the standard GLOCK 43. You'll need holsters specifically designed for the 43X/48 platform, such as those from Tier 1 Concealed or Vedder Holsters.
- How long does shipping take?
- Shipping to FFL dealers takes 3-5 business days after verification, plus your FFL's processing time. We use FedEx Priority Overnight for firearms to ensure chain-of-custody integrity.
- Can I return it if it doesn't fit?
- No, all firearm sales are final once transferred through an FFL due to federal regulations. We recommend handling one at a local range or store before purchase—consider renting a standard 43X to check fit.
- Does this work with TLR-6 lights?
- Yes, the GLOCK 43X is compatible with the Streamlight TLR-6 designed for 43X/48 models. It attaches via the trigger guard mount and provides 100 lumens of white light with optional laser.