Rock Island Armory Tac Ultra AOS .45 ACP 13+1
$830.99
About this product
The Rock Island Armory 1911 A2 Tac Ultra AOS is a .45 ACP 1911-style pistol built around the Agency Optic System (AOS) for optic compatibility. It ships with a 13-round magazine and features G10 grips, a Parkerized finish, and an accessory rail for lights or lasers. The design targets users who want a 1911 platform with modern service-oriented features for range, duty, or practical competition use.
Key Specifications
- Caliber: .45 ACP.
- Capacity: 13+1 rounds.
- Included magazine: one 13-round magazine.
- Finish: Black Parkerized.
- Frame: Steel frame.
- Grips: G10 grips.
- Optic compatibility: Optic-ready slide (AOS).
- Accessory: Accessory rail for lights or lasers.
- Sights: Front sight Glock; rear sight Glock.
- Barrel twist rate: 1-in-16″.
The TAC Ultra AOS blends 1911 ergonomics with contemporary features — optic readiness, rugged grips, and a Parkerized finish — making it a practical choice for shooters seeking a familiar platform updated for modern accessories and everyday range or duty use.
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Key attributes
| upc | 850071011050 |
| manufacturer | Armscor/Rock Island Armory |
| manufacturer part number | 57171AOS |
| action | Single Action |
| atf type | Pistol |
| barrel length | 5" |
| caliber/gauge | .45 ACP |
| capacity | 13 + 1 |
| number of magazines | 1 13 rd. |
| package height | 2.7 |
| package width | 10.2 |
| product type | Semi-Auto Pistol |
| shipping weight | 4.6 |
| sights | Fixed |
| sights type | Fixed Sights |
Sources & methodology.
Editorial review and rating by
Declan Vance
based on hands-on testing notes and published vendor specifications.
Pricing verified at time of publication.
$830.99