FMK Firearms G3 9mm 4.5-inch Threaded 14rd ODG

Description

The FMK Firearms G3 9mm 4.5-inch Threaded 14rd ODG is a compact, optics-ready striker-fired pistol built for shooters who want a suppressor-ready host out of the box. The slide is machined to accept Burris Fastfire 3, Vortex Viper, Vortex Venom, and Trijicon RMR-style micro red-dot optics without needing mounting plates. Each pistol ships with a polished stainless steel barrel, a redesigned metal slide stop, and a Fast Action trigger mechanism for a short pull and drop-free magazine release. Ambidextrous controls, fixed sights, and a textured polymer grip make this a practical choice for range, carry, or duty use.

Manufacturer	FMK Firearms (per manufacturer specs)
Model	G3
Material	Polymer frame, stainless steel barrel, steel slide
Compatibility	9mm Luger, threaded barrel 1/2×28 TPI
Finish	ODG (Olive Drab Green) polymer frame, black nitride slide
Weight	23.5 oz (unloaded, per manufacturer specs)
Condition	New

Key Features

• Optics-Ready Slide — direct-mount footprint for Burris Fastfire 3, Vortex Viper/Venom, and Trijicon RMR. No adapter plates to buy or lose, saving you $30-50 and keeping your sight low-pro.
• Threaded 4.5-inch Barrel — 1/2×28 TPI threads let you attach a compensator or suppressor. The polished stainless steel barrel resists corrosion and improves feed reliability.
• Fast Action Trigger — short take-up and crisp break with a positive reset. The trigger mechanism also ensures the magazine drops free every time.
• Ambidextrous Controls — reversible magazine release and slide stop lever make this pistol truly lefty-friendly. No swapping parts after purchase.
• Textured ODG Grip — aggressive stippling pattern locks your hand in place, even with wet or gloved hands. The olive drab green finish stands out from the usual black crowd.

Who It’s For

This FMK G3 is for the budget-minded shooter who wants suppressor-ready capabilities and red-dot compatibility without spending Zev or Agency Arms money. It fits concealed carriers who need a compact frame with a full-size sight radius, range shooters who want to run a can for fun, and anyone who appreciates ODG as a colorway that doesn’t show holster wear as fast as black.

Pros & Cons

• Pro: Direct-mount optics cut saves you the cost and hassle of adapter plates. Per FMK specs, the slide accepts four popular micro-dot footprints right out of the box.
• Pro: Threaded barrel is standard, not an aftermarket add-on. That alone saves you $75-100 compared to buying a separate threaded barrel for a Glock 19.
• Con: The trigger, while improved over earlier G2 models, still has a bit of creep before the break. It’s duty-grade, not match-grade — expect about 5.5-6 lbs pull weight. If you want a 3-lb trigger, you’ll need to swap it.

Comparison

Feature	FMK G3 (this pistol)	Zev Technologies OZ9	Lone Wolf Distributors Timberwolf
Price	$328.99	$1,199+	$449 (complete frame + slide)
Optics Ready	Yes, direct-mount RMR/Viper/Venom	Yes, with included plates	No (must be milled aftermarket)
Threaded Barrel	Included (4.5″, 1/2×28)	Optional ($199 extra)	Optional ($89 extra)
Frame Material	Polymer, ODG	Aluminum grip module	Polymer, black only
Warranty	Lifetime (per FMK)	Lifetime	1 year

FAQ

Does this pistol come with the red-dot optic?

No, the FMK G3 ships with the slide pre-machined for micro red-dot optics, but the optic itself is not included. You’ll need to purchase a Burris Fastfire 3, Vortex Viper, Vortex Venom, or Trijicon RMR separately and mount it directly to the slide.

Will this threaded barrel work with a suppressor?

Yes, the barrel has standard 1/2×28 TPI threads, which fit most 9mm pistol suppressors like the SilencerCo Omega 9K, Dead Air Wolfman, or Rugged Obsidian 9. You will also need a Nielsen device (piston) to cycle reliably.

Is the FMK G3 compatible with Glock holsters?

Not directly. The FMK G3 has a different trigger guard shape and slide profile than a Glock 19. You’ll need holsters specifically molded for the FMK G3. Some universal or adjustable holsters may work, but for retention, go with a dedicated FMK holster.

What magazines does this pistol use?

The FMK G3 ships with one 14-round magazine. It uses proprietary FMK magazines, not Glock mags. Spare magazines are available from FMK or aftermarket sources and typically run $25-35 each.

Can I carry this pistol concealed?

Yes. The compact G3 frame and 4.5-inch barrel make it suitable for IWB or OWB carry with a proper holster. The ODG finish helps it blend with earth-tone clothing. Just note that the threaded barrel adds about 0.6 inches to the overall length compared to a non-threaded model, so choose your holster accordingly.

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See more: FMK Firearms | Semi Auto Handguns | Threaded Barrel Pistols

Last updated: April 2026