AREX Delta M Gen 2 Tactical Optic Ready - Olive - 9mm, 4.6" Barrel, 15rd/17rd The AREX Delta M GEN 2 Tactical 9mm, takes all the great aspects of the original AREX Delta GEN 2 Optics Ready and adds to them. The new Arex Delta Gen 2 Tactical is an uncompromising handgun with a striker double-action trigger and an extended threaded barrel ready for a suppressor, or any other muzzle device. The suppressor height metal sights allow for co-witnessing with most reflex sights and unrestricted aiming even with a suppressor or other accessory attached. Arex has added an extended magazine release (right handed installed, left handed included) for lightning-fast magazine changes.