MFR 13.5 M-LOK ASSEMBLY BLACK 01-107-15189-006 Manufacturer Model Number: 01-107-15189-006 Manufacturer: Daniel Defense Model: MFR M-LOK Rail Type: Accessory-Rails Item Type: Accessory Finish: Type III Hard Coat Anodized Overall Length: 13.79" Weight: 8 oz Shipping Weight: 1.4 Feature: Free Floating Barrel Design Feature: Sling Swivel Attachment Points Feature: Continuous 1913 Upper Rail Optic Adjustable Objective: false Optic Reticle Illuminated: false