Franklin Armory F17-L | .17 WSM | 20″ Threaded Barrel

The Franklin Armory F17-L is a complete AR-style upper receiver assembly chambered in .17 Winchester Super Magnum. It pairs a 20″ threaded barrel and an OPS piston system with a slim Osprey Defense piston setup designed to function with suppressed or unsuppressed use without adjustment. The upper is optic-ready and includes a 20-round magazine.

Applications for this upper include precision varmint/field pest control and dedicated small-caliber target or precision shooting. Its features are oriented toward flatter-shooting small-caliber performance and low-maintenance operation in field conditions.

Product Specifications

• The caliber is .17 WSM.
• The barrel measures 20 inches and is threaded with a 1/2-28 thread pitch.
• The handguard is an integrated barrier stop and measures 15 inches, and is M-LOK compatible.
• The upper is optic-ready.
• The barrel twist rate is 1:9.
• The charging handle is a standard design.
• The bolt carrier is a F17 proprietary design.
• The gas system is an OPS piston system using the Osprey Defense slim piston.
• The gas block is a low-profile gas block.
• The muzzle device supplied is an Aura.
• The package includes a 20-round magazine.
• The product weight is 6.3 lbs.
• The UPC is 818725012853.

The F17-L upper emphasizes low-maintenance piston operation and a purpose-built small-caliber platform. Its 20″ threaded barrel and M-LOK handguard make it a flexible choice for shooters focused on varmint work and precision small-caliber shooting where a lightweight, flat-shooting cartridge is preferred. The included 20-round magazine and optic-ready upper allow you to build a focused, range-capable rifle around a mil-spec lower.