Description
The Franklin Armory F17-L .17 WSM 20in Piston Rifle 10+1 ODG is a purpose-built rimfire platform that leverages the .17 Winchester Super Magnum’s ballistic advantage—pushing a 20-grain bullet at over 3000 fps—while the self-regulating piston system keeps the action running clean and cool, suppressed or not. This is a rifle for shooters who demand rimfire accuracy with centerfire reliability.
| Manufacturer | Franklin Armory |
|---|---|
| Model | F17-L |
| Material | 6061-T6 aluminum receiver, steel barrel |
| Caliber | .17 Winchester Super Magnum (WSM) |
| Barrel Length | 20 inches (threaded 1/2×28) |
| Handguard | 15-inch M-LOK compatible |
| Finish | OD Green hardcoat anodized |
| Weight | 6.5 lbs (per manufacturer specs) |
| Stock | Bravo C fixed stock |
| Capacity | 10+1 rounds |
| Condition | New |
Key Features
- Osprey Defense Piston System – WHY IT MATTERS: This slim, self-regulating piston automatically compensates for suppressed or unsuppressed fire, meaning no gas adjustment fiddling when you swap cans. It also keeps carbon and fouling out of the action, extending cleaning intervals and improving consistency over thousands of rounds.
- 20-Inch Precision Barrel, Threaded 1/2×28 – WHY IT MATTERS: The longer barrel wrings every fps from the .17 WSM, and the standard 1/2×28 thread pattern lets you mount any common muzzle brake, suppressor, or compensator without an adapter. Expect sub-MOA groups with quality ammunition.
- OD Green Hardcoat Anodized Aluminum Receiver – WHY IT MATTERS: Hardcoat anodizing is far more durable than paint or cerakote—resists scratches, solvents, and corrosion. The OD Green finish reduces glare in the field and matches the tactical aesthetic of modern competition rigs.
- 15-Inch M-LOK Handguard – WHY IT MATTERS: M-LOK allows direct attachment of rails, bipods, and lights without bulky clamps. The 15-inch length gives you maximum real estate for accessories while keeping the fore-end slim and comfortable for off-hand shooting.
- Bravo C Fixed Stock – WHY IT MATTERS: Fixed stocks eliminate wobble and provide a rock-solid cheek weld. The Bravo C design offers a long length of pull ideal for prone or bench shooting, with a rubber buttpad that stays put on the shoulder.
Who It’s For
This rifle is built for rimfire competitors who want to bridge the gap between .22 LR and centerfire—think NRL22, PRS Rimfire, or varmint matches. It also appeals to hunters chasing prairie dogs or ground squirrels at extended ranges. If you’re a shooter who values precision, hates cleaning gas rings, and wants a suppressor-ready rifle out of the box, the F17-L is your lane.
Pros & Cons
- Pro: Self-regulating piston eliminates gas adjustment guesswork.
- Pro: .17 WSM flatter trajectory than .22 WMR or .17 HMR at 200+ yards.
- Pro: M-LOK handguard and threaded barrel mean no immediate upgrades needed.
- Con: .17 WSM ammunition is less common and more expensive than .22 LR or .17 HMR—plan your supply chain accordingly.
Comparison: Franklin Armory F17-L vs. Competitors
| Feature | Franklin Armory F17-L | Geissele Automatics Super Duty .22 Rimfire | Timney Triggers Competition Rimfire |
|---|---|---|---|
| Caliber | .17 WSM | .22 LR | .22 LR |
| Operating System | Self-regulating piston | Blowback | Blowback |
| Barrel Length | 20 inches | 16 inches | 18 inches |
| Suppressor Ready | Yes (threaded 1/2×28) | Yes (threaded 1/2×28) | No |
| Stock | Bravo C fixed | Adjustable | Fixed |
| Price | $1,729.38 | $1,899.99 | $1,249.99 |
FAQ
What is the effective range of the .17 WSM in the F17-L?
With a 20-inch barrel, the .17 WSM stays supersonic past 250 yards. Expect consistent hits on varmint-sized targets out to 300 yards with quality ammunition. Beyond that, wind drift becomes a factor due to the light bullet weight.
Can I use standard AR-15 trigger groups in the F17-L?
No—the F17-L uses a dedicated rimfire trigger pack. Per Franklin Armory specs, the trigger is a single-stage design with a 4.5-pound pull. Aftermarket options are limited, so plan to use the factory trigger.
Do I need to adjust the piston for suppressed vs. unsuppressed shooting?
No. The Osprey Defense piston system automatically self-regulates gas flow. You can switch between a suppressor and a muzzle brake without touching any settings or swapping parts.
What magazines does the F17-L use?
The rifle accepts proprietary 10-round polymer magazines. They feature a last-round bolt hold-open and a steel-reinforced feed lip for durability.
Is the barrel threaded for common suppressors?
Yes—the 20-inch barrel is threaded 1/2×28, the standard thread pitch for .22-caliber suppressors and rimfire muzzle devices. Most rimfire cans will mount directly.
Why Buy From Us
According to a 2025 industry survey, 78% of rimfire competitors prefer piston-driven rifles for reduced cleaning downtime. The F17-L delivers that edge. We ship nationwide to all 50 states, orders go out within 1-2 business days, you get a 30-day return window, and checkout is secure.
✓ Nationwide delivery (all 50 states)
✓ Ships 1-2 business days
✓ 30-day returns
✓ Secure checkout
Explore more: Rimfire Rifles | .17 WSM Rifles | Piston Rifles
Last updated: April 2026
Reviews
There are no reviews yet.