The Franklin Armory OPS-16 (brand part no. 00-10066-BLK) is a piston-driven 5.56 NATO AR-15 rifle built on a 16-inch barrel and equipped from the factory with Franklin Armory’s BFSIII trigger. The piston operating system runs cooler and cleaner than a standard direct-impingement AR, while the BFSIII trigger gives shooters a distinct, controllable firing option beyond a standard single-stage trigger. It suits shooters who want a piston-driven AR-15 with a factory-installed performance trigger already dialed in. The 1:7 twist barrel handles a wide range of 5.56 bullet weights.

Key Specifications

• Chambered in .223 Remington/5.56 NATO, the standard AR-platform cartridge.
• Rifling twist of 1:7 inches stabilizes a broad range of 5.56 bullet weights.
• Fitted with a 16-inch barrel for full-length ballistic performance.
• Runs a piston-driven operating system instead of standard direct impingement.
• Equipped from the factory with Franklin Armory’s BFSIII trigger.
• Ships in a 30+1 capacity configuration.
• Weighs approximately 13.5 pounds in its case.
• Uses an ultra-slim M-LOK handguard with a Picatinny top rail and M-LOK slots on all seven sides.
• Fitted with Franklin Armory’s proprietary Triumvir linear-compensating flash suppressor.

Frequently Asked Questions

What is different about the BFSIII trigger? It is Franklin Armory’s factory-installed performance trigger, giving shooters a distinct, controllable firing option beyond a standard single-stage trigger.

Is this a piston or direct-impingement rifle? Piston driven, which runs cooler and cleaner than a standard direct-impingement AR-15.

Buy the Franklin Armory OPS-16 Piston Rifle

This piston-driven, BFSIII-equipped rifle is ready to ship where available. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and check out more Franklin Armory rifles alongside other semi-auto rifles.