PSA Rock 5.7 RK1 5.7x28mm Full-Size Pistol – 5.2 in Fluted Threaded Barrel, Optics-Ready Slide, 23+1, Black
This Palmetto State Armory Rock 5.7 RK1 stands out for its windowed, optics-ready slide and a 5.2 in fluted, threaded barrel set up for 1/2x28 TPI. It includes RMR- and DR-pattern adapter plates, two 23-round steel magazines. The pistol shows excellent overall condition with a clean, mirror-bright bore.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Only slight handling evidence is visible on close inspection. The bore appeared bright at the time of listing.
What's Included
- Two 23-round steel 5.7x28 magazines (with witness holes; bodies stamped 5.7x28 near the base; unmarked polymer floorplates)
- RMR-pattern adapter plate (installed)
- DR-marked adapter plate
- Blank/spacer plate
The RK1 variant features a windowed 416 stainless slide with front and rear serrations and an integral optics cut. The optics-ready setup ships with RMR- and DR-pattern plates plus a blank/spacer, giving the buyer ready-to-mount options out of the box.
The 5.2 in carbon steel barrel is both fluted and threaded in 1/2x28 TPI, pairing reduced weight with immediate suppressor or muzzle-device compatibility. The delayed-blowback, striker-fired action is chambered in 5.7x28mm and feeds from 23-round magazines for a 23+1 capacity.
Sight cuts provide a dovetailed front blade and a rear notch; sight configuration may vary with optics plate choice. Iron sights are installed, providing a clear baseline depending on optic and plate choice.
The black polymer frame includes an integral three-slot Picatinny accessory rail on the dustcover and is marked "5.7 ROCK" and "Palmetto State Armory - West Columbia, SC." A trigger safety is standard. Made in the USA.