Ruger-57 5.7x28mm Semi-Auto Pistol, Model 16401 Manual-Safety, 20+1, 4.94-inch Barrel, Black
This Ruger-57 Model 16401 is a full-size, USA-made 5.7x28mm pistol built in 2021, notable for its delayed-blowback system with internal hammer, 20+1 capacity, and a 4.94-inch barrel with 1:9 RH twist and eight grooves. It pairs an alloy-steel slide and barrel with durable black finishes and a glass-filled nylon frame, and includes a green fiber-optic front sight with a fully adjustable square-notch rear. The slide is drilled and tapped beneath a removable, two-screw top plate for optics adapter plates, and the dust cover carries a Picatinny-style accessory rail.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Mild signs of use are present.
What’s Included
- Ruger factory hard plastic case
- Two 20-round Ruger factory steel magazines marked 5.7x28
Chambered in 5.7x28mm, this pistol offers a 20+1 capacity in a full-size format. The action is a delayed-blowback design driven by an internal hammer, providing a distinctive operating system for this caliber. The barrel measures 4.94 inches and uses a 1:9 RH twist with eight grooves.
Construction emphasizes strength and weight savings: the barrel is alloy steel with a black nitride finish, and the slide is alloy steel with a black oxide finish. The frame is glass-filled nylon in black, with textured polymer grip surfaces that include the molded Ruger phoenix logo.
Controls and safeties are comprehensive: manual thumb safety, trigger safety, no magazine disconnect, hammer catch, lightweight firing pin, and a neutrally balanced sear. The two-piece trigger incorporates an integral blade safety.
For handling and setup, the slide features front and rear cocking serrations and a top lightening window. The slide is drilled and tapped beneath a removable top plate retained by two screws, allowing the use of optics adapter plates. Sighting equipment includes a green fiber-optic front and a windage/elevation-adjustable square-notch rear. A Picatinny-style accessory rail on the dust cover supports common weapon-mounted lights or accessories.
This example corresponds to Ruger part number 16401 and was manufactured in 2021 in the USA. The factory case label identifies SKU 16401 with a matching serial. The listed MSRP is $549.