Product Description The Strike Industries GridLok Full Duty rail for HK416/MR556/M27 IAR is a mission-ready free-float handguard built for rapid configuration changes. Designed around the HK OEM barrel nut, it uses Strike Industries&&';; patent-pending Quick Rail Detach GRIDLOK locking latch to let you swap handguards in seconds for different setups or fast access for adjustments and suppressor installation/removal. The Full Duty model provides a full-length 1913 Picatinny top rail, integrated flip-up front sight, and M-LOK accessory mounting at the 3, 6, and 9 o&&';;clock positions. A suppressor-clearance front cut supports diameters up to 1.57 inches, while integrated QD sockets and an indexing rear rail tab help keep your system aligned and sling-ready. Product Highlights Quick Rail Detach GRIDLOK locking latch enables fast handguard swaps on HK416/MR556/M27 IAR platforms Full-length 1913 Picatinny top rail (Full Duty) for optics, lasers, and accessories M-LOK slots at 3, 6, and 9 o&&';;clock plus integrated QD swivel sockets for flexible accessory and sling mounting Built-in flip-up front sight provides an integrated backup aiming solution 6061-T6 aluminum, one-piece free-float design; front cut fits suppressors up to 1.57 in diameter Specs Brand: Strike Industries Model: GridLok Series: Full Duty Type: Free-float handguard / rail system Mounting Interface: M-LOK Top Rail: Full-length 1913 Picatinny Quick Detach System: GRIDLOK Quick Rail Detach locking latch; mounts to factory HK OEM barrel nut Length: 9 in Suppressor Clearance (Diameter): Up to 1.57 in Material: 6061-T6 Aluminum Color: Black Width (flat-to-flat): 1.75 in (44.45 mm) Height (bottom to top of Picatinny rail): 2.50 in (63.50 mm) Weight: 14.4 oz Integrated Features: Built-in flip-up front sight; (4) QD swivel sockets at 2, 4, 8, & 10 o&&';;clock; rear rail tab for receiver indexing Compatibility: HK416 / HK416 A5 / HK416 A7 / MR556 / M27 IAR (without ambidextrous sling attachment points) UPC: 793811764710 Manufacturer Part Number: GRIDLOK416FD9 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 product&&';;s manufacturer.