Ohhunt Lightweight Honeycomb Hollowed Out Design Handguards Design for Extreme Weight Savings Without Sacrificing Strength, Provide a Tight Fit, Solid Grip, and Lightweight Free Float Design for Your AR15 Build, it has a large enough Diameter (ID 1.8") to fit most muzzle devices and suppressors, pre-drilled for End Caps (not Included), Come with Barrel Nuts for Immediate Installation.

AR-15 Large Diameter Handguard:

1. 1.8" Large Diameter: The larger diameter(1.81") of the handguard will allow mounting on a bigger part like a silencer, fits most muzzle devices and suppressors.
2. Smooth CNC Machining:  No Sharp Edges, all The Cutout Edges Are Beveled To Ensure The Safety For Handling.
3. Lightweight Design : Hex Vented Design for Comfort and Weight Reduction, Cool Both Your Handguard and Barrel.
4. Pre-Drilled for the End Cap: Pre-Drilled at the End for the (Not Include), Keep Debris and Branches from Getting Caught Up in the Rail System and Gas Block.
5. Integral Anti-rotation Tabs: Features Integral Anti-rotation Tabs for Accurate Alignment with the Upper Receiver while Completely Preventing the Handguard From Rotating Under Heavy Use.
6. Mounting System: 3 Sides of M-Lok Slots & Top Picatinny Rail, Hold All Your Accessories. 2 QD Sling Mount Positions at 3 and 9 O'clock for Accepting Quick Detach Sling Swivel (sling swivel is not included).
7. 7075-T6 Aluminum Barrel Nut: This AR15 Barrel Nut is Made of High Quality 7075-T6 Aluminum, it Provides Greater Tensile Strength, Shear Strength, and Brinell hardness. 

• Type: .
• Rail: Full Length Top Picatinny Rail.
• Features: Large ID(1.8"), Round Tube Design, Lightweight,.
• Weight (including hardware): 232g(7")/268g(9")/281g(10")/294g(11")/311g(12")/331g(13.5")/360g(15")/389g(17")
• Outside Width: 2 Inches.
  
• Inside Width: 1.81 Inches.
• Barrel Nut Inside Width: 1.2 Inches.
• Outside Height (Including top rail): 2.22 Inches.
• Handguard Material: 6061 Aluminum.
• Barrel Nut Material: 7075 Aluminum.
• Barrel Nut Thread: American Thread 1 1/4-18 UNE.
• Pieces: 1.
• Manufacturer: ohhunt

Tips: Barrel nut comes installed in the handguard, it will have to be removed to install handguard on the upper.