Product Spotlight: Franklin Armory F17

Introduction

Hey everyone, Caleb and Steve from Brownells here! Today, we have something special from Franklin Armory—the F17, which is an AR-15 chambered in 17 WSM. This isn’t just any AR-15. The 17 WSM is the fastest and hottest rimfire round available. Let’s break down the features of this unique rifle and why it’s a great option for rimfire hunting in certain states.

Overview of the 17 WSM Round

The 17 WSM (Winchester Super Magnum) is currently the fastest rimfire round on the market, even surpassing the 17 HMR. It delivers more velocity and muzzle energy, which makes it a great option for long-range shooting. Steve mentions that, unlike other rimfire rounds, the 17 WSM provides better performance at longer distances, allowing for successful shots at 200-400 yards.

Rimfire Hunting Applications

This rifle is particularly useful for hunters in states that restrict hunting certain animals to rimfire cartridges. Some states only allow rimfire rounds for varmint hunting, and that’s where the 17 WSM shines. Caleb explains that this rifle allows you to reach out to longer distances when hunting varmints like coyotes, which is difficult to do with other rimfire rounds like the 17 HMR or .22 Magnum. Osprey Piston System and Reliability One of the biggest challenges in developing a semi-auto rifle for 17 WSM is managing the high pressures of the round. Steve explains that Franklin Armory solved this issue by using the Osprey piston system. The piston system ensures reliable cycling and prevents blowback issues that occur with blowback-operated rimfire rifles. The piston-operated system also allows the bolt to lock into the barrel extension, ensuring smooth and safe operation.

Disassembling the F17

To get a closer look, Caleb disassembles the rifle. The takedown process is similar to a standard AR-15, with familiar controls and mechanisms. The lower receiver is mostly standard, but Franklin Armory added QD studs to the receiver for sling attachment, which is a nice touch. Caleb points out that there’s also an extra buffer piece in the receiver extension, which shortens the bolt travel due to the shorter 17 WSM cartridge.

Internal Components: Buffer, Bolt Carrier, Spring

The buffer system is adjusted for the 17 WSM round. The bolt carrier group, however, is noticeably different from a standard AR-15. It includes a tiny bolt head and a larger carrier to accommodate the piston system. The bolt carrier also features forward assist notches, ensuring reliability in a variety of conditions. The rifle is also equipped with a mil-spec charging handle, which can be swapped out for something like a Radian handle if preferred.

Examining the Piston System

Caleb removes the handguard to reveal the Osprey piston system, which is positioned close to the chamber to ensure reliable cycling. The short-stroke piston taps into the gas system near the front of the chamber, driving the action. This setup is highly efficient for the short 17 WSM cartridge and ensures smooth operation without overpressuring the system.

Unique Design Features and Handguard

The F17 features a billet upper receiver with a free-floating handguard. The handguard is equipped with anti-rotation tabs and is secured using a specialized barrel nut. This setup provides stability, allowing you to mount accessories like a bipod for longer-range shooting. Caleb appreciates the patterned front of the magwell, which adds a tactile surface for those who prefer to grip the rifle there.

Barrel Length, Twist Rate, and Muzzle Device

The rifle comes with a 16-inch barrel, which is the legal minimum for a rifle-length barrel. It has a 1:9 twist rate, which is relatively fast for a rimfire round. Caleb and Steve discuss the muzzle brake, which is threaded for a 1/2x28 suppressor or compensator. While the brake likely doesn’t make a huge difference with the 17 WSM’s recoil, it’s a nice feature to have, especially for customization. Reassembling the F17 Reassembly of the rifle is straightforward, following standard AR-15 procedures. The handguard is reattached using the lock screws, and the buffer and spring are placed back into the receiver extension. Caleb wraps up the reassembly process, noting that the rifle is easy to take apart and maintain, just like any other AR-15.

Closing Remarks

That’s the Franklin Armory F17! It’s a unique option for anyone looking for a semi-auto rimfire rifle with long-range capabilities. Whether you’re dealing with hunting restrictions or simply want a fast, accurate rimfire round, the F17 delivers. If you have any experience with the 17 WSM or have tried the F17, let us know in the comments. Thanks for watching, and we’ll see you next time!