The Springfield Armory 1911 Operator AOS Threaded in .45 ACP pairs a 5.75-inch threaded barrel with a black Cerakote finish and a red dot ready slide (brand part no. POT9240AOS). The .578×28 threads take muzzle devices, which is the point of this variant over the standard 5-inch Operator. The Agency Optic System plates let a red dot mount directly to the slide, while a tritium front sight and a black serrated rear sight stay usable behind it. The barrel is DLC coated stainless steel, and VZ Grips G10 panels handle the hold. It is a full-size 1911 from Springfield Armory that ships with two 8-round magazines.

Key Specifications

• The chambering is .45 ACP, the cartridge the 1911 was designed around.
• The barrel is a 5.75-inch forged stainless steel barrel with a DLC coating, which adds surface hardness and wear resistance.
• The muzzle is threaded .578×28, the pattern used for .45 ACP muzzle devices.
• Rifling twist is 1:16, matched to standard .45 ACP loads.
• The pistol ships with two 8-round magazines, so a spare comes in the box.
• The slide is optic ready through the Agency Optic System, a series of mounting plates that fit a wide range of popular red dots.
• The sights are a tritium front with a black serrated rear, which stay usable alone or behind an installed red dot.
• The slide is forged carbon steel with black Cerakote, a finish that resists corrosion.
• The frame is forged carbon steel in black Cerakote, matching the slide.
• Grips are VZ Grips scalloped G10, a no-slip surface that holds up when hands are wet.

Frequently Asked Questions

What thread pattern does the barrel use? The 5.75-inch barrel is threaded .578×28 for attaching muzzle devices.

Can I mount a red dot on it? Yes. The slide is cut for the Agency Optic System, which uses interchangeable plates to fit a wide range of popular red dots.

What sights does it have? A tritium front sight and a black serrated rear sight.

Buy the Springfield Armory 1911 Operator AOS .45 ACP Pistol, 5.75-Inch Threaded Barrel (.578×28), Black, Optic Ready, Tritium Front Sight, 8-Round

Choose the threaded Operator if you want a .45 ACP 1911 that is ready for both a red dot and a muzzle device. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more semi-auto handguns while you are here.