Description
The Arex Delta X Optic Ready Black is the full-size Delta in all-black, with a 4-inch plain-muzzle barrel and a factory optic cut. It ships with one 17-round magazine and one 17+2 extended magazine, along with the adapter plates needed to mount a red dot, which makes it complete out of the box rather than a starting point.
Full Size and Optic Ready
4-inch barrel with a plain muzzle, so standard holsters fit without extra clearance.
Optic-ready slide cut at the factory, with adapter plates supplied for the common red dot footprints.
The Arex Delta X Optic Ready Black is finished in black across slide and frame rather than two-tone.
Accessory rail on the dust cover for a weapon light or laser.
Capacity, Controls and Frame
One 17-round magazine and one 17+2 extended magazine supplied, giving 17+1 in standard configuration.
Ambidextrous magazine release and slide stop.
Interchangeable backstraps, so grip circumference adjusts to the hand.
Serialized trigger assembly rather than a serialized frame.
Striker-fired action with a polymer frame.
Arex Delta X Optic Ready Black Specifications
- Caliber: 9mm Luger
- Capacity: 17+1 standard, 19 rounds with the supplied extended magazine
- Barrel: 4 inch, unthreaded
- Slide: optic ready with adapter plates supplied
- Finish: black slide and frame
- Frame: polymer with interchangeable backstraps
- Controls: ambidextrous magazine release and slide stop
- Trigger: serialized trigger assembly
- Magazines: one 17-round and one 17+2 extended
- Accessory rail: yes
- UPC: 815537023954
The X is the full-size Delta, which means a longer grip than the compact M and two more rounds in the standard magazine. For a home defense or duty pistol that is the better trade, since concealment matters less than control and capacity. Both sizes share the same 4-inch barrel and the same slide, so the difference is entirely in grip length.
Why it is worth considering
- Optic cut and adapter plates included from the factory.
- Two magazines, one of them extended to 19 rounds.
- Ambidextrous controls and interchangeable backstraps.
- Plain muzzle fits standard holsters.
- Serialized trigger assembly rather than a serialized frame.
Who it suits
Home defense buyers and range shooters who want a full-size 9mm ready for a red dot will be well served here, and two magazines in the box means less to buy on day one. If the two-tone look appeals more, the same pistol is offered with a flat dark earth frame; if a compensator or suppressor is planned, the Tactical version adds a threaded barrel.
Choosing Within the Delta Range
Arex builds the Delta in M, X and L sizes, each available plain-muzzle like this one or in the Tactical configuration with a threaded barrel and suppressor-height sights. The same pistol with a flat dark earth frame is the two-tone option, the M Optic Ready is the compact version holding 15, and the X Tactical adds threads. Browse the wider handgun catalog. Arex pistols are imported by Global Ordnance.
For practice, 115-grain full metal jacket is the standard load, with a 124-grain jacketed hollow point for defensive use. Spare 17-round magazines fit both the X and the L.
On the serialized trigger assembly: because the serial number lives on the trigger group rather than the polymer frame, the grip module is an unregulated part that can be replaced without a transfer. All firearm orders ship to a licensed FFL dealer for transfer, and MAG5 Firearms will coordinate the paperwork with the dealer of your choice.
A practical note on holsters: because the M and X share a slide and barrel, most holsters cut for one accept the other. What differs is grip length, which sits above the holster mouth rather than inside the shell. If you end up owning both sizes, a single holster often covers them.
On optic plates: the set supplied covers the common red dot footprints, and because the cut is machined at the factory to a known depth, mounting is a matter of choosing the right plate rather than measuring and shimming. That is a meaningful saving over having a slide milled after purchase, which typically costs well over a hundred dollars plus shipping and downtime.
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