Palmetto State Armory PX-9 Gen 4 Shockwave 9 mm AR-9 Pistol – 4" Threaded Barrel, 27+1 Capacity, Matte Black
The PX-9 Gen 4 Shockwave distills Palmetto State Armory’s AR-9 experience into a compact, brace-equipped pistol that feeds from common Glock-pattern magazines. Built on matching billet-aluminum upper and lower receivers, it pairs a 4-inch 4150 CMV barrel with a fluted blast-can muzzle device and a free-floating 5-inch M-LOK handguard. The result is a U.S.-made, straight-blowback PCC that offers easy magazine compatibility, solid construction, and a lighter, smoother Enhanced Polished Trigger.
Condition
Overall Condition: Excellent – showing only faint signs of prior use or handling.
Bore Condition: Excellent – clean, mirror finish, no signs of wear.
Bore Rifling: Excellent – sharp lands and grooves.
Specific Condition Notes: The pistol exhibits just a few light handling marks, and the bore remains bright from chamber to muzzle.
What’s Included
- Palmetto State Armory PX-9 Gen 4 Shockwave pistol
- Three 27-round polymer Glock-pattern magazines
The dedicated Glock-pattern lower incorporates a true last-round bolt-hold-open, giving shooters familiar magazine availability with the functionality they expect from an AR-style pistol.
The 4-inch 4150 CMV steel barrel wears a durable nitride finish and is threaded 1/2-28 TPI, ready for common muzzle devices or suppressor mounts. PSA’s fluted blast-can is installed to direct concussion forward while preserving a compact profile.
A slick-side billet upper with a continuous Picatinny rail mates to a 5-inch free-float M-LOK handguard, providing a rigid mounting surface for optics and accessories without adding bulk.
Inside, PSA’s hybrid 9 mm bolt-carrier group runs on a straight-blowback system tuned for reliability with a wide range of 9 mm loads. The Enhanced Polished Trigger delivers a crisp, lighter pull than standard mil-spec units.
The Shockwave brace and Magpul MOE grip round out the package, keeping weight low while offering ergonomic control in a compact, maneuverable format.