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Rimfire semi-autos have one well-known habit: they get filthy fast. Franklin Armory tackled that head-on with the F17-X, the first piston-driven rimfire platform on the market. Instead of a blowback action dumping carbon into the receiver with every shot, the Osprey Defense slim piston system keeps things running noticeably cleaner, which matters when you're burning through a prairie dog town all afternoon. And the piston self-regulates too, so whether you're running a suppressor or shooting it bare, there's nothing to adjust. Just load a mag and go.
The .17 Winchester Super Magnum is the hot rod of the rimfire world, pushing a 20-grain bullet at velocities that rival some centerfire loads. That means a seriously flat trajectory, minimal wind drift for a rimfire, and real authority on ground squirrels, prairie dogs, and other pests out well past typical .22 WMR distances. The F17-X pairs that cartridge with a 16-inch barrel, a 1:9 twist, and 1/2×28 muzzle threads, so adding a can is as simple as spinning one on. A custom tuned trigger helps you get the most out of the cartridge's accuracy potential.
Handling the F17-X feels familiar from the first pickup. Hardcoat anodized aluminum upper and lower receivers, a flat top ready for the optic of your choice, a B5 Bravo adjustable stock, and a slim M-LOK handguard with an integrated barrier stop for steadying shots off fences, truck hoods, or shooting sticks. Controls are right where your thumb expects them.
This version ships with a 20-round magazine, which is a real advantage when the targets come fast and the action stays hot. For a dedicated varmint rifle that shoots flat, stays clean, and plays nice with suppressors, this one is tough to beat.
It's the first piston-driven rimfire platform ever built. Most rimfire semi-autos use blowback actions that vent carbon straight into the receiver, so they gum up quickly during long sessions. The F17-X's Osprey Defense piston system keeps the action much cleaner and handles the higher pressure of the .17 WSM cartridge far better than blowback designs could.
Yes, and that's one of the best parts of this rifle. The piston system self-regulates for suppressed or unsuppressed fire, so there are no gas settings to fiddle with. The 16-inch barrel is threaded 1/2×28, which is the most common rimfire thread pitch, so most rimfire cans thread right on.
Varmint and pest control is where this rifle shines. The .17 WSM launches a 20-grain bullet fast enough to shoot extremely flat with light recoil, making it ideal for prairie dogs, ground squirrels, and similar small game at distances beyond what a .22 WMR handles comfortably. The 20-round magazine and semi-auto action are a big plus when targets pop up fast.
No, it ships without sights. The flat-top aluminum upper is optic ready, so you can mount whatever suits your style of shooting. Most owners pair it with a variable magnification scope to take advantage of the .17 WSM's flat trajectory at longer ranges.
| UPC | 818725010484 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 00-10058-BLK |
| Action | |
| ATF Type | MODERN SPORTING RIFLE |
| Barrel Length | 16" |
| Caliber/Gauge | .17 WSM |
| Capacity | 20 + 1 |
| Color | Black |
| Length | 47.5500 |
| Number of Magazines | 1 20 rd. |
| Package Height | 4.0 |
| Package Width | 10.3 |
| Product Type | Rifle |
| Safety | Thumb |
| Shipping Weight | 13.0 |
| Sights | No |
| State Restriction (IL) | NO SALE TO ILLINOIS PICA |
| State Restriction (MN) | NO SALE TO MINNESOTA |
| State Restriction (RI) | NO DIRECT SHIP TO RHODE ISLAND |
| State Restriction (WA) | NO DIRECT SHIP TO WASHINGTON |
| Barrel Finish | Black |
| Magazine Included | 1 x 20-Round |
| Model | |
| Thread Pattern | 1/2"-28 tpi |
| Units per Box | 1 |
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