Microtech Amphibian Ram Lok S E Blue Aluminum Fluted, 4.0″ M390MK Blade, Made in USA (137RL-10FLBL)

A Full Size Ram Lok Amphibian with a Deep Blue Finish

The Amphibian Ram Lok S E Blue Aluminum Fluted brings the Amphibian’s ergonomic design and strong cutting profile into a full size Ram Lok configuration. With a 4.0 inch M390MK blade, blue anodized fluted aluminum scales, and Microtech’s tuned bar lock system, this version delivers excellent reach, premium materials, and smooth manual deployment.

At 5.38 inches closed, this Amphibian offers serious in hand presence while retaining comfortable carry with its refined machining and balanced profile.

Note from Lone Star Knife and Supply

This is one of the cleanest Amphibian configurations. The blue anodizing is rich and the fluting gives the handle real grip without being overly aggressive. The 4 inch M390MK blade is a strong performer and the Ram Lok system makes the action smooth and secure.

Standout Features

• 4.0 inch Bohler M390MK blade with a stonewash finish

• Blue anodized aluminum handle with fluted machining for grip and style

• Ram Lok bar lock system engineered by Microtech for strength and durability

• Thumb stud deployment for controlled, smooth opening

• Deep carry pocket clip and lanyard hole for practical everyday carry

• Made in the USA with Microtech fit and finish

Specifications

• Model Number: 137RL-10FLBL

• Model Name: Amphibian Ram Lok S E Blue Aluminum Fluted

• Blade Length: 4.0 inches

• Closed Length: 5.38 inches

• Overall Length: Approx. 9.3 inches

• Blade Steel: Bohler M390MK

• Blade Finish: Stonewash

• Blade Style: Single edge

• Handle Material: Blue anodized fluted aluminum

• Action: Manual thumb stud

• Lock Type: Ram Lok bar lock

• Pocket Clip: Tip up

• Weight: Approx. 4.5 to 4.8 ounces

• Country of Origin: USA

• Packaging: Boxed

Why You Will Want It

The Amphibian Ram Lok S E Blue Aluminum Fluted combines a full size blade, premium steel, smooth action, and a clean blue finish into a reliable American made folder that feels both capable and refined. If you want a larger Ram Lok with real presence, this is a great choice.