Description
The Beretta M9A4 G 9mm 5.1″ Threaded Barrel FDE 18rd is a full-size service pistol built on a proven aluminum frame with a Flat Dark Earth Cerakote finish. It incorporates a 5.1-inch threaded steel barrel and a proprietary optic-ready slide cut for micro red-dot footprints. Designed with a 3-slot Picatinny rail and tritium night sights, the M9A4 suits duty, home defense, and practical shooting scenarios where optics compatibility and capacity matter.
| Manufacturer | Beretta |
|---|---|
| Model | M9A4 G |
| Material | Aluminum frame, steel barrel |
| Compatibility | 9mm Luger, 18-round magazines (Beretta factory) |
| Finish | Flat Dark Earth Cerakote |
| Weight | 33.3 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Optic-Ready Slide Cut – Why it matters: You can mount a micro red-dot directly without an adapter plate, cutting weight and keeping a lower bore axis for faster follow-up shots.
- 5.1″ Threaded Barrel – Why it matters: Threaded for standard 1/2×28 muzzle devices, so you can run a suppressor or compensator right out of the box.
- Tritium Night Sights – Why it matters: Low-light visibility is instant and self-illuminating, critical for home defense or duty use when ambient light is gone.
- 3-Slot Picatinny Rail – Why it matters: Attach lights or lasers without proprietary adapters — standard rail means more holster and accessory options.
- 18-Round Magazine Capacity – Why it matters: 18+1 rounds of 9mm gives you the firepower to handle multiple threats before reloading.
Who It’s For
The M9A4 G is for shooters who want a duty-grade pistol with optics compatibility, suppressor capability, and high capacity. It works for law enforcement, military, competition shooters in USPSA or IDPA, and serious home defenders. The FDE finish and threaded barrel also appeal to enthusiasts building a two-tone or tactical kit.
Pros & Cons
- Pro: Verified reliability with ball and hollow-point ammo — Beretta’s M9 lineage is combat-proven.
- Pro: The “G” decocker-only lever eliminates the slide-mounted safety, giving a consistent draw and no manual safety to fumble.
- Pro: Magazine capacity tops most competitors at 18 rounds standard.
- Con: The slide is heavy compared to polymer-framed guns like the Glock 17 — that’s a tradeoff for the aluminum frame’s durability and reduced recoil.
Comparison
| Feature | Beretta M9A4 G | Zev Technologies OZ9 | Agency Arms Agency 419 |
|---|---|---|---|
| Frame Material | Aluminum | Polymer with steel chassis | Aluminum (custom) |
| Barrel Length | 5.1″ (threaded) | 4.5″ (threaded) | 5.1″ (threaded) |
| Optic Cut | Proprietary (micro red-dot) | RMR/Holosun footprint | RMR/Holosun footprint |
| Capacity | 18+1 | 17+1 | 17+1 |
| Price | $1,149 | $1,899+ | $2,500+ |
| Trigger | DA/SA (8.5 lb DA, 5.5 lb SA) | Striker-fired (4.5 lb) | Custom SA trigger |
FAQ
Does the Beretta M9A4 G come with suppressor-height sights?
Yes. The factory tritium night sights are taller than standard M9 sights, allowing a lower co-witness with red-dot optics. Per Beretta specs, they are designed for use with the included optic plate.
Can I use standard M9 magazines in the M9A4 G?
Yes. The M9A4 G accepts all Beretta 92/M9 series magazines in 9mm. The 18-round magazines included are the same as the M9A3 and 92X models.
Is the threaded barrel compatible with suppressors?
Yes. The 1/2×28 threads are the industry standard for 9mm suppressors. Beretta includes a thread protector cap. Note: the barrel is slightly longer than the slide, so check holster compatibility.
What red-dot optics fit the M9A4 G slide cut?
Beretta’s proprietary cut fits micro red-dots like the Trijicon RMRcc, Holosun 407K/507K, Shield RMS, and Leupold DeltaPoint Pro (with adapter). Per Beretta, the cut is designed for the “RMSc” footprint.
Does the M9A4 G have a safety?
The “G” model has a decocker-only lever — no manual safety. It decocks the hammer to the lowered position, then springs back to the ready position. This is preferred by many shooters for a consistent DA/SA trigger pull.
Trust & Delivery:
- ✓ Nationwide delivery (all 50 states, where legal)
- ✓ Ships 1-2 business days
- ✓ 30-day returns
- ✓ Secure checkout
Explore more: Semi Auto Handguns | Beretta Pistols | 9mm Pistols
Last updated: April 2026
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