Product Description The Strike Industries Strike Rail is a lightweight, feature-packed AR-15 handguard built for hard use while keeping your rifle streamlined. Designed with a 1.57-inch internal diameter for suppressor or Oppressor compatibility, this aluminum M-LOK rail provides a rigid mounting platform with a built-in anti-rotation feature, ambidextrous quick-detach (QD) socket placement, and a reinforced steel mounting nut and bolt. This 15.5-inch model features a distinctive blue finish and is not compatible with most gas piston systems. Product Highlights 15.5-inch AR-15 Strike Rail handguard with M-LOK accessory compatibility 1.57-inch internal diameter for suppressor or Oppressor compatibility Built-in anti-rotation feature helps maintain secure alignment under use Ambidextrous QD socket placement for flexible sling mounting options Reinforced steel mounting nut and bolt for durable, repeatable installation Specs Brand: Strike Product Type: AR-15 Handguard / Rail Model: Strike Rail (STRIKERAIL) Length: 15.5 in Accessory Attachment: M-LOK Material: Aluminum Finish/Color: Blue Internal Diameter: 1.57 in Mounting Hardware: Reinforced steel mounting nut and bolt Compatibility Notes: Not compatible with most gas piston systems Manufacturer Part Number: STRIKERAIL155BLU UPC: 708747547177 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.