Ruger Ruger-5.7 5.7x28mm 20+1 4.94″ Black
About this product
The Ruger Ruger-5.7 is a polymer-framed, optics-ready semi-automatic pistol chambered in the 5.7x28mm cartridge, designed to balance high capacity with low recoil in a compact defensive package. This represents Ruger's entry into a niche cartridge market previously dominated by FN Herstal. It delivers a 20+1 capacity in a platform measuring just 8.65 inches overall length.
What is the Ruger-5.7 used for?
The Ruger-5.7 is engineered for modern defensive roles where magazine capacity and flatter trajectory are prioritized, particularly for shooters needing a low-recoil option. Its 4.94-inch barrel optimizes the 5.7x28mm round's velocity, making it effective for target shooting and a viable, high-capacity personal defense firearm. The optic-ready slide and accessory rail support red-dot sights and weapon lights for duty or home defense configurations.
How does the Ruger-5.7 compare to the FN Five-seveN?
The Ruger-5.7 offers a more accessible price point and a modernized, optics-ready slide directly from the factory, while the original FN Five-seveN established the platform. The Ruger's MSRP of $457.99 is typically several hundred dollars lower than an FN model, making the 5.7x28mm cartridge more attainable. However, the FN pistol may have a slight edge in established aftermarket support and a longer track record with military and law enforcement contracts.
What does it weigh and what are the dimensions?
The Ruger-5.7 weighs 23.9 ounces unloaded and measures 8.65 inches in overall length with a 4.94-inch barrel. Its width is 1.41 inches, and height is 5.6 inches to the top of the rear sight. You can handle a Stevens 334 Rifle for a comparison in a heavier, centerfire rifle platform. This makes it a full-size duty pistol in footprint but manages weight effectively through its polymer frame construction.
Who is this NOT for?
This pistol is not for budget-conscious shooters focused solely on cost-per-round, as 5.7x28mm ammunition remains more expensive than 9mm Luger. It's also a poor fit for those seeking a traditional double-action/single-action trigger, as it utilizes a double-action-only Secure Action system with a trigger pull averaging 8 pounds. New shooters prioritizing fundamental skills with ubiquitous, affordable ammunition should start with a standard 9mm semi-auto.
What's in the box?
The factory packaging includes the Ruger-5.7 pistol, one 20-round steel magazine, a plastic pistol lock, a basic owner's manual, and a polymer storage case. Unlike some competition-grade pistols, it does not include an optic mounting plate—you must purchase the correct plate for your specific red-dot footprint separately. This is standard for most factory optics-ready slides at this price point.
Is the Ruger-5.7 worth it at $457.99?
At $457.99, the Ruger-5.7 offers substantial value by democratizing access to the 5.7x28mm platform with modern features like an optic-cut slide. When you consider that a comparable Stevens 555 Sporting shotgun costs a similar amount, this pistol delivers significant technical capability for the price. It's a justifiable purchase if you specifically want the ballistic profile of the 5.7x28mm round without FN's premium price tag.
Specs at a glance
Video review
Pros & cons
What works
- 20+1 capacity in a 5.7x28mm platform — holds 8 more rounds than a standard Glock 17 9mm magazine.
- Optics-ready slide milled for direct mounting — eliminates a $150-200 aftermarket machining cost.
- Weighs 23.9 oz unloaded — over 5 ounces lighter than an all-steel 1911 commander model.
- Secure Action trigger provides consistent 8-pound pull — eliminates transition between DA/SA modes.
Trade-offs
- 5.7x28mm ammunition costs ~$0.70 per round — nearly double the cost of 9mm practice ammunition.
- Double-action-only trigger has a long, heavy reset — not ideal for precision target shooting without modification.
- No included optic mounting plate — requires an additional $30-50 purchase for specific red-dot footprint.
Expert review
Key attributes
| upc | 736676164080 |
| manufacturer | Ruger / Sturm, Ruger & Co. |
| manufacturer part number | 16408 |
| action | Double Action Only |
| barrel length | 4.94" |
| caliber/gauge | 5.7 x 28 mm |
| capacity | 20 + 1 |
| safety | Ambidextrous |
| sights type | Fiber Optic Front/Adj Rear |
| slide description | Serrated |
Frequently asked questions
- Is it compatible with FN Five-seveN magazines?
- No, the Ruger-5.7 uses proprietary 20-round steel magazines and is not cross-compatible with FN Five-seveN magazines. Ruger designed its own magazine geometry and release system, though both hold the same 5.7x28mm cartridge. Always verify magazine compatibility by manufacturer part number before purchase.
- Does this work with a Holosun 507C red dot sight?
- Yes, but it requires an adapter plate. The slide is drilled and tapped for optics but uses a proprietary footprint. You must purchase a Ruger-specific mounting plate, model #90360 for the Holosun 507C, which secures to the slide before mounting the optic. The process takes about 10 minutes with a proper torque wrench set to 15 in-lbs.
- How long does shipping take to an FFL?
- Standard processing time is 1-2 business days, with ground shipping typically taking 3-7 business days to the continental United States. Shipments to a Federal Firearms License (FFL) holder cannot be expedited due to regulatory controls. You must contact your chosen FFL for their transfer procedures and fees before ordering.
- Does the barrel have a threaded option for a suppressor?
- No, the factory barrel on this model is not threaded; it is a standard 4.94-inch button-rifled barrel with a black nitride finish. If you require a suppressor host, you must either purchase an aftermarket threaded barrel or explore a different model explicitly marketed as 'threaded.' Check local NFA regulations regarding pistol suppressors.