The Zenith Firearms ZF-300 in 300 Blackout is a semi-automatic pistol built on a roller-delayed blowback operating system—a design that delivers reliable, smooth operation across suppressed and unsuppressed firing. Chambered in 300 BLK, this American-made pistol brings modern ergonomics and versatility to a caliber favored by hunters and shooters running short-barreled setups, especially with suppressors. The 12-inch cold hammer-forged barrel provides the velocity needed for effective subsonic and supersonic rounds, while the full-length Picatinny rail and free-floating M-LOK handguard with heat shield give you room to mount optics, lights, or other tactical accessories.
What sets the ZF-300 apart is attention to detail: an ambidextrous safety lever, last-round bolt hold-open for easy reloading, and a buffer tube-compatible end cap that lets you add a stabilizing brace if your local laws permit. The trigger breaks at 6–8 pounds, tuned for control without unnecessary weight. Built to handle the demands of both range work and field use, the ZF-300 ships with a 30-round AR-magazine, high-quality carrying case, and manual, so you're ready to run from day one.
This is a serious platform for 300 BLK shooters who want accuracy, modularity, and American manufacturing without the AR-15 footprint. Whether you're building a dedicated hunting rig, a suppressed range gun, or a compact home-defense setup, the ZF-300 delivers proven reliability in a package that won't break your budget.
| Caliber | 300 BLK |
| Operating System | Roller-delayed blowback |
| Mode of Fire | Semi-automatic |
| Barrel Length | 12 inches |
| Barrel Material & Finish | Cold hammer-forged 4150 CMV |
| Barrel Threading | 5/8×24 RH (right-hand) |
| Rifling | 6 grooves, 1:8 RH twist |
| Magazine | 30-round AR magazine |
| Trigger Pull | 6–8 lbs |
| Safety | Ambidextrous manual lever |
| Rail System | Full-length Picatinny rail |
| Handguard | M-LOK, free-floating with heat shield |
| Weight (without magazine) | 7 lbs |
| End Cap | Buffer tube compatible |
The ZF-300 comes with a buffer tube-compatible end cap, which means you can install a stabilizing brace if your local and federal laws permit. As shipped, it's a semi-automatic pistol in 300 BLK.
Yes. The barrel is threaded 5/8×24 right-hand, the standard for most 300 BLK suppressors. The 12-inch barrel and 300 BLK cartridge make this platform ideal for suppressed shooting.
The ZF-300 ships with one 30-round AR magazine, a high-quality carrying case, and a user manual. You'll need to source ammunition, but you're set for transport and initial use.
The full-length Picatinny rail on top accommodates any standard Picatinny-mount optic or sight. The free-floating M-LOK handguard supports M-LOK accessories like rail sections, grips, slings, and lights. The integrated heat shield protects your hand during extended shooting.
Zenith Firearms
