The Strike Industries GridLok Full Duty handguard (brand part no. GRIDLOK416FD9) is a 9-inch M-LOK rail built for the HK416, HK MR556, and M27 IAR platform, designed specifically with law enforcement and special operations users in mind. It mounts to the factory HK OEM barrel nut using Strike Industries’ patent-pending GridLok quick-rail-detach locking latch, which lets a shooter swap between a primary and secondary handguard configuration in seconds rather than minutes. That means an operator can run the GridLok as a primary handguard and keep the HK factory rail on hand as a backup, or vice versa, without needing to break down the upper. It is built in black aluminum and is compatible with HK416, HK416 A5, HK416 A7, MR556, and M27 IAR uppers that lack ambidextrous sling attachment points.

Key Specifications

• Measures 9 inches in length with a 1.57-inch diameter profile.
• Built from black aluminum with an M-LOK attachment system.
• Uses a quick detach mounting latch for fast handguard swaps.
• Mounts to the factory HK OEM barrel nut, requiring no proprietary hardware.
• Compatible with HK416, HK416 A5, HK416 A7, MR556, and M27 IAR platforms.

Frequently Asked Questions

What platforms is this handguard compatible with? HK416, HK416 A5, HK416 A7, MR556, and M27 IAR uppers without ambidextrous sling attachment points.

Does this handguard require a proprietary barrel nut? No, it mounts to the factory HK OEM barrel nut.

Buy the Strike Industries GridLok Full Duty Handguard

Order this Strike Industries handguard from our Lubbock, Texas gun shop for fast, direct shipping, and browse more AR handguards for your build.