The Eos RDS v2 Perfect Zero originated as a steel frame variant of the popular Ares 4.25 and was initially engineered for the operator who is less concerned about weight than longevity. Early in development, Atlas recognized that the additional six ounces from the steel frame made very little difference for carry and all the difference for "shootability". The additional weight, plus the porting, earned the Eos the right to carry the vaunted title of Perfect Zero pistol. The Eos comes with two 120mm flush fit premium lockback magazines, one 126mm premium lockback magazine, a Trijicon RMR/SRO optic plate, and a soft case. Features: Barrel Length/Type: 4.25" Ported Bull Sight Radius: 6" Total Weight: 36oz w/ No Magazine Trigger Break Weight: 3lbs Rear Sight: .120 RDS ADJ Front Sight: Fiber .250Tx.110W Maintenance Interval: 10k Optic Ready: Yes Recoil Spring: 4.25" 13lbs Main Spring: 17lbs Magwell: N/A Finish Type: Matte Grip Texture: Carry Grip Material: AL High Grip Ambi Safeties: Yes Tactical Rail: Yes