The Arex Delta X Gen2 is a striker-fired 9mm pistol with a 4-inch barrel and 19-round capacity, built on a polymer frame with interchangeable backstraps. It ships optics-ready with mounting plates included, and a loaded chamber indicator provides visual confirmation without cycling the slide. 
 

Key Specifications 

• Model: Arex Delta X Gen2 
• Caliber: 9MM LUGER (9X19 PARA) 
• Action: Striker Fired 
• Capacity: 19 Rounds 
• Barrel Length: 4 inches 
• Weight: 1.4 lbs (without magazine) 
• Finish: Black/Flat Dark Earth 
   

Detailed Features 

The interchangeable backstraps let shooters adjust grip circumference to hand size without aftermarket parts. The optics mounting plates accommodate common red dot footprints, so there is no milling required. Consistent striker-fired trigger pull is predictable shot to shot. The loaded chamber indicator is a useful safety check during handling and storage. 
 

Target Audience 

The Delta X Gen2 fits home defenders, sport shooters, and new shooters looking for a full-size-feeling 9mm with high capacity at a competitive price point. 
 

Usage Scenarios 

At 19 rounds, the magazine gives plenty of capacity for range practice without constant reloads. The optics-ready slide makes mounting a red dot straightforward for those who want one. The manageable 9mm recoil and ergonomic grip geometry make it accessible for newer shooters while giving experienced shooters the capacity and features they want.

The Arex Delta X Gen2 gets generally positive reviews, with a few recurring areas where owners push back.

Ergonomics rank near the top of what people like. The grip shape and texture draw favorable comparisons to other full-size striker-fired pistols, and users report it holds up well during longer sessions. The 19-round capacity is a consistent plus, appreciated both at the range and for home defense considerations.

The optics-ready setup gets regular praise. Shooters who want to run a red dot find the included mounting plates convenient, and the slide cut is well-executed compared to some add-on solutions.

Build quality comments are mostly positive. Most reviewers describe the pistol as solid and appropriately durable for regular use.

On the critical side, a few owners find it heavier than expected for a 1.4-lb polymer pistol (the unloaded weight with a full magazine changes the feel considerably). Trigger feel divides opinion; some find the pull weight and reset acceptable, others prefer a crisper break and shorter reset. Aftermarket accessories and dedicated holsters are harder to source than for more established platforms, which is worth knowing before buying.