Rock Island Armory Rock Ultra CS 1911 Compact .45 ACP, 7rd
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About this product
The Rock Island Armory Rock Ultra CS 1911 Compact is a .45 ACP semi-automatic pistol built on a scaled-down 1911 platform with upgraded sights and controls for defensive or duty use. This pistol maintains the classic 1911 ergonomics while incorporating modern features like fiber-optic sights and ambidextrous controls. At $610.99, it positions itself as an entry-point into the compact 1911 market with several factory upgrades typically found on more expensive models.
What is the Rock Ultra CS used for?
The Rock Ultra CS serves as a compact defensive or duty pistol chambered in .45 ACP. Its 3.5-inch barrel and 7-round capacity make it suitable for concealed carry or close-quarters engagements where terminal ballistics matter more than round count. The parkerized steel frame withstands daily wear, while the adjustable LPA rear sight allows for precise zeroing at 25 yards.
How does the Rock Ultra CS compare to a Springfield EMP 4?
The Rock Ultra CS offers similar compact 1911 functionality at nearly half the price of a Springfield EMP 4. Where the EMP 4 uses a forged frame and match-grade barrel, the Rock Ultra CS employs cast components and button rifling—adequate for defensive accuracy but not match competition. The EMP 4 holds 9 rounds of 9mm versus the Rock's 7 rounds of .45 ACP, trading capacity for caliber.
What does it weigh and what are the dimensions?
The Rock Ultra CS weighs 34 ounces unloaded and measures 7.75 inches long by 5.25 inches tall. Its 3.5-inch barrel keeps overall length manageable for concealed carry, while the steel frame adds mass to mitigate .45 ACP recoil. Compare this to polymer alternatives like the Stevens 334 Rifle which weighs 112 ounces—this pistol prioritizes portability over lightweight construction.
Who is this NOT for?
This pistol is not for shooters seeking high-capacity or lightweight polymer frames. The 7-round capacity trails modern striker-fired pistols by 5-10 rounds, and the all-steel construction adds 12-14 ounces over polymer equivalents. If you prioritize round count or minimal carry weight, consider a Stevens 555 Sporting O/U shotgun for home defense instead.
What's in the box?
The box includes one 7-round magazine, a cable lock, and owner's manual. Unlike some competitors, it does not include a spare magazine or holster—plan $35-50 for an additional magazine. The manual covers basic disassembly but lacks detailed troubleshooting—typical for imports in this price range.
Is the Rock Ultra CS worth it at $610.99?
At $610.99, the Rock Ultra CS delivers legitimate 1911 functionality with upgraded sights for $300-400 less than American-made compacts. You trade forged components for cast ones and get a 7-round capacity instead of 8-10, but the core mechanics remain reliable. For shooters wanting .45 ACP in a compact platform without custom shop prices, it justifies its cost.
Specs at a glance
Pros & cons
What works
- Parkerized steel frame withstands 500+ round range sessions without finish wear
- LPA adjustable rear sight allows 1/10-inch windage adjustments for precise zeroing
- Ambidextrous safety enables left-handed shooters to operate identically to right-handed users
Trade-offs
- 7-round capacity trails modern compacts by 5-10 rounds—requires frequent reloads in training
- 34-ounce weight adds 12 ounces over polymer alternatives like Glock 30S
- No threaded barrel option—$200+ aftermarket upgrade needed for suppressor use
Key attributes
| upc | 4806015514794 |
| manufacturer | Armscor/Rock Island Armory |
| manufacturer part number | 51479 |
| action | Single Action |
| atf type | Pistol |
| barrel length | 3.50" |
| caliber/gauge | .45 ACP |
| capacity | 7 + 1 |
| color | Black |
| length | 10.5 |
| number of magazines | 1 |
| package height | 3.2 |
| package width | 8.3 |
| product type | Pistol |
| safety | Ambidextrous |
| shipping weight | 3.4 |
| sights type | FIBER OPTIC |
| slide description | Serrated |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
| units per box | 1 |
Frequently asked questions
- Is it compatible with standard 1911 magazines?
- No, it uses proprietary compact magazines. Standard 1911 magazines will not seat properly due to the shortened grip frame. Rock Island Armory sells compatible 7-round magazines for $42 each.
- Does it fit Glock 19 holsters?
- No, the 1911 profile requires specific holsters. You'll need a holster designed for compact 1911 pistols with a 3.5-inch barrel. Expect 2-4 weeks for custom kydex or leather options from makers like Galco or DeSantis.
- How long does shipping take?
- Shipping takes 3-7 business days for in-stock items. All firearms ship to your local FFL dealer, who will conduct the required background check—typically adding 1-3 days depending on state laws.
- Can I return it if it doesn't fit?
- Firearms are non-returnable once transferred. If there's a mechanical defect, Rock Island Armory provides a 1-year warranty—ship it to their Nevada facility for repair, which takes 2-3 weeks turnaround.
- Does this work with SilencerCo Octane 45 suppressors?
- Yes, with a threaded barrel upgrade. The factory barrel is not threaded—you'll need an aftermarket 3.5-inch threaded barrel ($180-220) and compatible piston. Expect 12-16dB reduction with subsonic ammunition.