The Arex Delta X Gen2 is a semi-auto 9mm Luger pistol with a 4-inch barrel, 17-round capacity, and a black finish. It comes with five optics mounting plates included, making it ready for a red dot without additional hardware. Interchangeable backstraps let you adjust grip size, and the ambidextrous magazine release works for either hand. Weight is 1.2 lbs without a magazine. 
 

Key Specifications 

• Model: Arex Delta X Gen2 
• Caliber: 9MM Luger (9X19 Para) 
• Action: Semi-Automatic 
• Capacity: 17 Rounds 
• Barrel Length: 4 inches 
• Weight: 1.2 lbs (without magazine) 
• Finish: Black 
   

Features 

The five included optics plates cover a wide range of common red dot footprints, so you're not locked into one optic brand from the start. The short reset trigger helps with follow-up shots, and the loaded chamber indicator gives a visual and tactile confirmation of a chambered round. The interchangeable backstraps are a practical touch for shooters who want to fine-tune their grip without buying aftermarket parts. 
 

Usage 

Works for self-defense, competitive shooting, and range use. The 17-round capacity and optics-ready design make it a capable option for those who want to run a dot. At 1.2 lbs unloaded, it's light for a full-size 9mm.

Owners of the Arex Delta X Gen2 are generally positive about it, with reliability, ergonomics, and the optics-ready setup being the main draws.

Reliability comes up consistently. Most owners report smooth, consistent cycling in both casual and training use. The ergonomics get good marks too; the grip feels comfortable in hand and holds up over longer sessions. The optics-ready design with five included plates is a frequently mentioned plus; buyers appreciate not having to source additional parts just to mount a red dot.

The 17-round capacity is another positive. Most find it a solid number for a pistol this size. Build quality is generally rated well, and the solid feel is noticed, especially by buyers who've compared it to similarly priced pistols from other brands.

Value is a recurring theme. People feel the feature set is competitive for the price, particularly when benchmarking against Glock or SIG models at similar price points.

Critiques focus on customer service and parts availability, which comes up in some discussions as a potential weak point. Arex is a smaller brand with less retail presence than the major names. Aesthetic opinions vary, though the black finish itself doesn't draw much criticism. Some buyers compare it unfavorably to established brands on intangibles like aftermarket ecosystem or resale value.