The X4MSD Picatinny Aluminum Quad Rail is designed the for AR15/M4/M16 rifles providing durability, reliability, and balance during combat.
The X4MSD Picatinny Aluminum Quad Rail allows the option of a Pictainny rail for additional accessories of mounting tactical lights, slings, grips, etc. It is defined 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 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 and back
- The bottom rail is secured with friction fit ledge and a retractable spring loaded piston
- Slots around the rails provide maximum ventilation
- CNC machined from aviation grade aluminum to MIL-1913 standard
- Manufactured with a hard anodized black oxide finish for durability
Technical details:
- Width Max (cm): 5.5
- Height Max (cm): 6.0
- Length Max (cm): 18.5
- Weight (grams): 300.0
Constructed for: M16/M4/AR15







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