Geissele Automatics 10.5'' Hk416 Mk15 Super Modular Rail Smr M-Lok Black

The Geissele Automatics 10.5" HK416 MK15 Super Modular Rail (SMR) is a precision-engineered handguard built for shooters who demand durability and adaptability. Built from 6061-T6 aluminum with military-spec type 3 hardcoat anodize, this M-LOK rail system works with the stock HK barrel nut, preserving compatibility while delivering the strength and rigidity that Geissele is known for. Whether you're setting up a short-barrel rifle for tactical work, home defense, or precision shooting, this rail gives you the platform to mount exactly what you need.

The SMR combines full-length picatinny real estate along the top with M-LOK slots at 3, 6, and 9 o'clock positions, letting you run optics, lights, lasers, and vertical grips without compromise. Shortened picatinny rails on the forend keep weight down while maintaining mounting flexibility where it counts. At 10.3 ounces, it balances substance with control—no unnecessary bulk, but no compromise on rigidity either.

This is a serious tool designed by and for people who put optics and accessories to work in demanding conditions. If you're building a short-barreled HK416 or clone and want a handguard that won't hold you back, the Geissele SMR MK15 is engineered to deliver.

Key Features

• 6061-T6 aluminum construction with military-spec type 3 hardcoat anodize finish
• Compatible with stock HK barrel nut—no special tools or modifications needed
• Full picatinny rail on top; shortened picatinny rails on forend
• M-LOK slots at 3, 6, and 9 o'clock for flexible accessory mounting
• Lightweight at 10.3 ounces without sacrificing rigidity
• 10.5" length optimized for short-barrel rifle builds

Specifications

Frequently Asked Questions

Will this rail fit my HK416 or HK416 clone?

Yes. The Geissele SMR MK15 is designed to work with the stock HK barrel nut, so no modifications or proprietary tools are required. Confirm your rifle uses a standard HK416 platform before ordering.

Can I mount a scope and light at the same time?

Absolutely. The full-length picatinny rail on top accommodates any standard optic mount, and the M-LOK slots at 3, 6, and 9 o'clock give you multiple options for mounting lights, lasers, grips, and other accessories without interference.

How much does this rail weigh?

The SMR MK15 weighs 10.3 ounces, keeping your short-barrel setup responsive while maintaining the rigidity needed for reliable performance under accessories and use.

Is this handguard suitable for short-barrel rifles?

Yes. At 10.5" in length, the SMR MK15 is purpose-built for short-barrel HK416 platforms and is a popular choice for SBR, home defense, and close-quarters setups where a compact profile matters.