Arisaka Defense M-LOK Finger Stop - Anodized Black Finish - SKU: FS-M - UPC: 642049218352
Product Description
The Arisaka Defense M-LOK Finger Stop (FS-M) is a compact, low-profile control accessory engineered to improve recoil control, hand placement consistency, and weapon retention on M-LOK handguard rail systems. Designed with a minimal footprint, the FS-M functions seamlessly as a forward index point, a barrier stop, or a pull-stop between the index and middle fingers, preventing hand slippage toward hot barrels or muzzle devices on short-barreled rifles (SBRs) and AR pistols.
Precision CNC-machined in the USA from 6061-T6 aluminum and finished in a durable MIL-A-8625 Type III hardcoat black anodizing, the FS-M weighs less than an ounce while maintaining extreme structural rigidity. Its rounded, bi-directional profile allows comfortable control regardless of grip style or hand size, whether running C-clamp rifle holds or traditional handguard indexing.
Occupying just one M-LOK slot, the Arisaka FS-M installs flush against handguard rails without interference to surrounding weapon lights, laser target designators, or top-rail optics.
*Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Direct fit for all standard M-LOK handguard slots (occupies 1 slot).
- Verify host firearm is completely clear, magazine removed, safety engaged, and chamber confirmed empty.
- Loosen the M-LOK T-nuts on the FS-M assembly so the gap between the nut and the indexing tabs equals the thickness of the handguard wall.
- Insert the T-nuts into the desired M-LOK handguard slot, ensuring the finger stop rests flat against the rail surface.
- Apply light outward pulling pressure on the finger stop while tightening the IP20 Torx screw to ensure the T-nuts rotate 90 degrees into the locking position.
- Torque the Torx screw to 15-20 in-lbs using a calibrated torque driver.
Key Features
- Ultra-Compact Low Profile: Minimal height and length design provides a tactile indexing point without snagging on gear or slings.
- 6061-T6 Billet Aluminum Construction: Machined from high-strength aerospace aluminum for rugged durability and light weight.
- Type III Hardcoat Anodized Black Finish: Deep matte black surface treatment offers superior resistance to corrosion, scratches, and barrel heat.
- Multi-Functional Indexing: Acts as a forward barrier stop, rear pull stop, or finger placement guide for consistent hand staging.
- Single M-LOK Slot Attachment: Occupies minimal rail space, leaving room for weapon lights, switches, and sling mounts.
- Bi-Directional Ergonomic Profile: Reversible design accommodates multiple hand sizes and shooting grip styles.
Product Specifications
- Brand: Arisaka Defense
- MPN: FS-M
- SKU: FS-M
- UPC: 642049218352
- Interface: M-LOK System (Occupies 1 Slot)
- Material: 6061-T6 Aluminum
- Hardware: Grade 8 Steel M-LOK T-Nuts & Torx Screws
- Finish/Color: MIL-A-8625 Type III Hardcoat Anodized Black
- Country of Origin: Made in USA
