X4-FCS with X4-LRF on Front Rail
The X4-FCS sits at 1.93” (49mm) Height Above Rail (HAR).
The X4-LRF low-profile design allows for mounting on the front rail without blocking the view of your scope.
The X4 FCS-to-LRF Cable* comes in 8” (203 mm) and 20” (508 mm) lengths to accommodate various weapons and configurations.
Augment your setup with either the X4 Low-Profile Remote or the X4 Rail-Mounted Remote.
Wirelessly link to Magpul Rounds Remaining technology (coming soon) for accurate round count displays in your X4-FCS.
*Cable required for FCS-to-LRF link.
(Wireless linking coming in 2026)
X4-FCS with X4-LRF Mounted Above
For compact rail configurations, the X4 Diving Board Mount enables the X4-LRF to be mounted above the X4-FCS.
The X4 FCS-to-LRF Cable is still utilized in this configuration.
The X4 Low-Profile Remote or X4 Rail-Mounted Remote is easily added here also.
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X4-FCS with X4-LRF on Side Rail
Similar to the front rail configuration.
In this configuration, the 20” X4 FCS-to-LRF Cable is recommended.
THE COMPLETE X4 SYSTEM
The X4-LRF ™ and X4-FCS ™ can each function independently.
Or link them together for the ultimate fire control and ranging solution.
Explore the following configurations to fit your needs:
