Rock River Arms LAR-PPS 5.56 NATO AR Pistol, 9 in Chrome-Moly Barrel, Piston-Driven PDS, Threaded 1/2x28
This Rock River Arms LAR-PPS is a compact, piston-driven AR-pattern pistol built around RRA's proprietary bufferless PDS system. It features forward, ambidextrous, non-reciprocating charging handles, a two-position adjustable gas regulator, and a full-length T-marked Picatinny top rail. With a 9-inch chrome-moly barrel threaded 1/2x28 and an overall length of about 18.25 inches, it delivers a streamlined, highly portable package chambered in 5.56 NATO.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: The finish shows wear on the lower and upper receivers. There are spots of surface rust on the gas block. The bore is bright and clean.
What’s Included
- Rock River Arms LAR-PPS 5.56 NATO AR pistol
- 1x 30-round Magpul PMAG GEN M2 MOE polymer magazine
The LAR-PPS uses Rock River Arms' proprietary bufferless PDS that replaces the traditional buffer tube with over-barrel guide rods and springs. This design shortens the overall package while maintaining reliable short-stroke gas piston operation. The rear of the receiver is capped with a bufferless endcap incorporating a short 1913 rail segment.
Its 9-inch chrome-moly steel barrel is threaded 1/2x28 and fitted with an A2 birdcage flash hider. The 1:9 RH twist supports a broad range of 5.56 NATO loads, and factory literature notes compatibility with .223 Rem. Capacity is 30+1.
The slick-side upper deletes the forward assist and includes an ejection port cover. A full-length, T-marked Picatinny top rail (T2–T32) runs the length of the receiver and handguard for mounting accessories. The cylindrical, ribbed, ventilated handguard includes a short 6 o'clock accessory rail segment.
Ambidextrous, non-reciprocating, forward-mounted charging handles enable easy manipulation from either side. Controls are standard AR-15 layout with a left-side bolt catch, right-side magazine release, and a manual safety. The pistol wears a rubber finger-groove pistol grip for a secure hold.