Product Description The Strike Industries GridLok Lightspeed Rail for the HK416/MR556/M27 IAR platform is a purpose-built, free-float handguard engineered for fast configuration changes. Its patent-pending Quick Rail Detach GRIDLOK locking latch mounts directly to the factory HK OEM barrel nut, allowing rapid handguard swaps for mission-specific setups. The Lightspeed configuration provides integrated 1913 Picatinny sections and an adaptable M-LOK interface, plus a built-in flip-up front backup iron sight (BUIS). A suppressor-ready front cut accommodates suppressors up to 1.57 inches in diameter, and multiple rear QD sling sockets support flexible carry options. Product Highlights Quick Rail Detach GRIDLOK locking latch enables fast handguard removal/reinstall using the HK OEM barrel nut Lightspeed rail layout with 1913 Picatinny sections and M-LOK slots at 3, 6, and 9 oclock for accessories Built-in flip-up front BUIS for a streamlined backup sighting solution Rear alignment tab helps index the rail precisely with the HK upper receiver Suppressor-capable front cut fits suppressors up to 1.57 in (39.9 mm) diameter Specs Brand Name: Strike Model/Series: GridLok, Lightspeed Product Type: Free-float handguard / rail Mounting Interface: M-LOK Quick Detach: GRIDLOK Quick Rail Detach locking latch; mounts on HK OEM barrel nut Compatible Platforms: HK416 / HK416 A5 / HK416 A7 / MR556 / M27 IAR (without ambidextrous sling attachment points) Length: 9 in Suppressor Clearance (Front Cut): up to 1.57 in (39.9 mm) diameter Material: 6061-T6 aluminum Color: Black QD Sockets: (4) sockets at 2, 4, 8, and 10 oclock positions Integrated Sight: Flip-up front backup iron sight (BUIS) Width (flat to flat): 1.75 in (44.45 mm) Height (bottom to top of Picatinny): 2.50 in (63.50 mm) Weight: 14 oz Manufacturer Part Number: GRIDLOK416L9 UPC: 793811764673 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the products manufacturer.