The BCM Gunfighter KeyMod Picatinny Rail Section, sold here in a 4-inch nylon version (brand part no. BCM-KMR-1913-N4-BLK), is made of lightweight, impact-resistant polymer built to Mil-Standard 1913 Picatinny Arsenal specifications. Bravo Company Mfg uses corrosion-resistant stainless steel mounting hardware, and the section features a snag-resistant design that still retains full mil-standard rail specs for accessory compatibility. The self-contained assembly eliminates the risk of losing loose mounting hardware during installation or removal. This 4-inch section fits any KeyMod interface mounting surface, giving a slightly longer optic or accessory mounting run than the 3-inch version.

Key Specifications

• Measures 4 inches in length.
• Constructed from lightweight, impact-resistant polymer.
• Built to Mil-Standard 1913 Picatinny Arsenal specifications.
• Uses corrosion-resistant stainless steel mounting hardware.
• Ships as a self-contained assembly, eliminating loose-hardware loss during install.
• Fits any KeyMod interface mounting surface.

Frequently Asked Questions

How long is this rail section? 4 inches.

What mounting interface does it fit? Any KeyMod interface mounting surface.

What is the mounting hardware made from? Corrosion-resistant stainless steel.

Buy the BCM Gunfighter KeyMod Nylon Rail Section, 4-Inch, Black

Order this BCM KeyMod rail section from Bravo Company Mfg through our gun accessories and parts lineup. It ships fast from our Lubbock, Texas gun shop, fully insured.