The Geissele Super Modular Rail MK4 delivers precision manufacturing and lightweight strength for AR-15 platforms. This 10.5-inch free-floating handguard transforms accuracy potential while maintaining the durability standards expected from Geissele Automatics.
What Makes This Different
The MK4 rail system features Geissele's proprietary barrel nut design that eliminates timing issues common with standard handguards. Machined from 6061-T6 aluminum with a Type III hard coat anodized finish, it weighs 40% less than quad-rail alternatives while providing superior rigidity. The continuous top rail maintains sight plane alignment from receiver to muzzle.Key Features
- Free-floating design eliminates barrel contact for enhanced accuracy
- M-LOK attachment system at 3, 6, and 9 o'clock positions
- Continuous Picatinny rail on top for optics and backup sights
- 10.5-inch length accommodates carbine-length gas systems
- Anti-rotation tabs prevent handguard movement under stress
- Compatible with standard AR-15 upper receivers
- Includes proprietary barrel nut and installation hardware
Technical Specs
- Length: 10.50 inches
- Weight: 10.6 ounces
- Material: 6061-T6 aluminum construction
- Finish: Type III hard coat anodized black
- Attachment: M-LOK compatible slots
- Rail: Continuous Picatinny top rail
- Compatibility: AR-15 platform upper receivers
- Made in USA with lifetime warranty
