THIS IS THE TUBE ONLY! OPTIONAL CLAMP, RAILS, & ACCESSORIES SOLD SEPARATELY (see Compatible Products for this model): Over-all length: 7.5" Weight with hardware: 8.1 oz. Inside diameter: 1.75" Outside diameter: 1.970" Installation Instructions • The Apex Extended Carbine Length Handguard has a cutout to accommodate a front sight without removal or replacement • Mounts to the factory style barrel nut already in place on most rifles • Top rails, sold separately, mount only to the 12 o'clock position (see Compatible Products for this model) • Accessory rails, sold separately, mount to 7 positions at 45-degree intervals to encourage air movement over barrel and gas tube (see Compatible Products for this model) • M-LOK compatible • Four built-in quick detach sling swivel mounting holes eliminate the need for a rail-mounted sling swivel • MIL-SPEC hard anodized aluminum, matte finish • All steel hardware is BLACKNITRIDETM coated to resist corrosion • The Apex Handguard including hardware is 100% made in the USA