The Daniel Defense RIS II MK18 Handguard (brand part number 01-004-08020-006) is a free-float quad-rail handguard finished in black and sized to the shorter MK18 CQB profile, popularized on the Mk18 CQBR-style carbine. Built as a 2-piece clamshell design, it carries a full-length quad rail on all four sides for mounting lights, grips, and other accessories, wrapped around a rigid free-float barrel nut for a rock-solid zero on shorter-barreled builds. It is a genuine Daniel Defense part, built to the fit and finish the company is known for on duty and CQB-focused rifles.

Key Specifications

• Length is approximately 9.55 inches, matching the compact MK18 profile.
• Construction is a 2-piece clamshell design.
• Rail configuration is a full-length quad rail on all four sides.
• Attachment is free-float, isolating the barrel from handguard pressure for a consistent zero.
• Finish is black.
• Comes from Daniel Defense’s RIS II MK18 product line.

Frequently Asked Questions

What profile is this handguard sized for? It is sized to the compact MK18 profile popularized on the Mk18 CQBR-style carbine.

How does it attach to the upper? It uses a 2-piece clamshell design around a free-float barrel nut.

Buy the Daniel Defense RIS II MK18 Handguard

Get a compact, duty-proven quad rail built for short-barreled CQB carbines. Shop more Daniel Defense handguards in our AR handguards selection, and this handguard ships fast from our Lubbock, Texas gun shop.