Springfield Armory Kuna 9mm Factory-Braced Micro Pistol, 6 in Threaded Barrel, Roller-Delayed, Nexus Billet Lower
This factory-braced Springfield Armory Kuna stands out as a micro 9mm pistol with a roller-delayed blowback system, a 6.0 in threaded barrel with a factory multi-port brake, and a monolithic aluminum upper. This example is upgraded with a Nexus Firearms billet aluminum lower and an upgraded Sig Sauer trigger, pairing a recent 2025-introduced design with a premium lower assembly and trigger feel.
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: Minimal markings from previous handling and use. The bore is bright and clean. Refer to pictures.
What’s Included
- 2x 35-round magazines
- 2x 30-round magazines (curved polymer magazines; two distinct patterns as shown)
- OEM polymer lower assembly for Kuna (uninstalled)
- Nexus Firearms billet aluminum lower (installed)
- Standalone recoil spring
- Additional muzzle device/compensator
The Kuna uses a roller-delayed blowback action in a compact micro format. The 6.0 in cold hammer-forged barrel features 1/2x28 threads and a Melonite finish, topped with a factory multi-port brake. The monolithic aluminum upper provides a full-length Picatinny top rail with T-marks and integral M-LOK slots along the handguard.
Controls emphasize ambidexterity and smooth operation: forward charging handles are reversible, folding, and non-reciprocating. Integrated hybrid metal sights offer a pistol-style U-notch when folded and an aperture/post setup when raised, giving instant, built-in sighting choices.
This example is customized with a Nexus Firearms billet aluminum lower and an upgraded Sig Sauer trigger. The brace is a side-folding metal unit on a receiver-mounted proprietary hinge (non-1913), aiding storage and transport. Approximate overall length is 16.5 in folded/collapsed and 24.25 in extended; weight is about 5 lb 5 oz.
Chambered in 9mm Luger, the pistol accepts detachable box magazines and is listed with a capacity of 35+1. Markings include Springfield Armory Geneseo, IL, HS Produkt Karlovac – Made in Croatia, the Springfield Armory crossed-cannons crest, and 9x19 caliber designation. The platform was introduced to the U.S. market in 2025 and is produced by HS Produkt for Springfield Armory.