Arisaka Pica RL Side Rail Arms for SCAR 17S Interface – Tactical Precision Mount

The Arisaka Pica RL is a precision rail mounting system designed to transform your rifle's Picatinny rail into a versatile, multi-position sliding platform. Built for shooters running the ARMS 17S interface—think Atlas PSR, Atlas CAL, MDT Cyke, or Magpul 17S bipods—this mount lets you dial in the exact position that works for your shooting style, whether you're setting up for a precision rifle match, a field hunt, or testing loads at the range. Instead of fixed mounting, you get smooth adjustability without sacrificing rigidity when you lock it down.

What makes the Pica RL stand out is the thoughtful engineering underneath. A push-button recoil lug keeps things locked under recoil, while a detented knob controls sliding tension and accounts for out-of-spec rails—a real-world problem on many rifles. That same knob means you can install or remove the mount without sliding it off the end of your rail, saving time and frustration during setup changes. Once dialed in, torque it down to maximum precision; the manufacturer recommends 30 inch-lbs for a solid, repeatable hold.

Built from stainless steel and hard coat anodized 6061-T651 aluminum (MIL-A-8625 Type III), the Pica RL is light at just 2.2 ounces and tough enough for field use. It's made in the USA and includes two 10-32 socket cap screws. You'll need a 5/32 Allen wrench for installation—not included, but likely already in your toolbox.

Key Features

• ARMS 17S pattern fits Atlas PSR, Atlas CAL, MDT Cyke, and Magpul 17S bipods
• Multi-position sliding mount with detented tension adjustment
• Push-button recoil lug for secure under-recoil hold
• Install or remove without sliding off the rail end
• Hard coat anodized aluminum and stainless steel construction
• Lightweight at 2.2 ounces
• Made in the USA

Specifications

Frequently Asked Questions

What bipods does the Arisaka Pica RL work with?

The Pica RL uses the ARMS 17S mounting pattern and is compatible with the Atlas PSR, Atlas CAL, MDT Cyke, and Magpul 17S bipods.

Can I install this mount without sliding it off the end of my rail?

Yes. The detented knob design allows you to install or remove the Pica RL without having to slide it off the rail end, making setup changes faster and easier.

What tools do I need to install the Pica RL?

You'll need a 5/32 Allen wrench to install the two included 10-32 socket cap screws. The recommended torque is 30 inch-lbs.

How does the tension adjustment knob work?

The detented knob controls the sliding tension of the mount, accounts for out-of-spec rails, and allows you to dial in the exact position and rigidity you need before locking it down.