The X4MS Picatinny Aluminum Quad Rail for AR15/M4 rifles with durability, reliability, and maintaining balance while interfacing with all issued weapon system components. The X4MS Picatinny Aluminum Quad Rail defines as a superior zero retention by having the upper three rail section mount underneath the end cap and secured in a place with a friction fit ledge with roll pins. The receiver end of the X4MS is tightly secured to the barrel with a nut bracket attached to the upper three rail section with four captive flathead screws. The bottom rail uses locking lugs with a retaining pin for a secure mount to the upper hand guard.
→ Top rail creates one long monolithic rail along with the existing flat top rail
→ Equipped with two push button sling swivel mounting points in the front
→ Slots around the rails provide maximum ventilation
→ Constructed of Alumium material
→ CNC machined to MIL-1913 standards with a hard anodized black oxide - ease for maintenance
→ Compatible with grenade-launchers
X4MS Picatinny Aluminum Quad Rail Measurements