The Daniel Defense MK18 Rail Interface System II (RIS II) was designed at the request of United States Special Operations Command (SOCOM) for the SOPMOD II program. It is a free-float rail for carbine gas systems and is used with the MK12 low-profile gas block. The two-piece design lets you remove the lower rail section so you can attach an M203 grenade launcher without extra parts or special tools.
The handguard attaches to the upper with a battle-tested 6-bolt bolt-up system and a steel barrel nut. It has an uninterrupted upper rail and mil-spec 1913 Picatinny rails. Machined from 6061-T6 aircraft-grade aluminum and finished with mil-spec Type III hard-coat anodizing. Fasteners are Grade 8 military specification.
The handguard attaches to the upper with a battle-tested 6-bolt bolt-up system and a steel barrel nut. It has an uninterrupted upper rail and mil-spec 1913 Picatinny rails. Machined from 6061-T6 aircraft-grade aluminum and finished with mil-spec Type III hard-coat anodizing. Fasteners are Grade 8 military specification.
Features
- MK18 Rail Interface System II (RIS II)
- Designed for SOCOM SOPMOD II
- Free-floating barrel design
- Designed for carbine gas systems
- Used with the MK12 low-profile gas block
- Two-piece design; lower rail section removes for M203 attachment without extra parts or special tools
- 6-bolt bolt-up system
- Steel barrel nut for the patented bolt-up system
- Uninterrupted upper rail and mil-spec 1913 Picatinny rails
- 6061-T6 aircraft-grade aluminum
- Grade 8 military specification fasteners
- Mil-spec Type III hard coat anodized
- Rail length: 9.55"
- Width: 2.23"
- Height: 2.25"
- Inside diameter: 1.15"
- Product weight: 14.1 oz
- Color options: Black and Flat Dark Earth
