Ergo Z-Rail Free Float AR15/M15 Rail System, Overshoot 4813-OS

More than just a standard quad-Pictinny Rail, the Ergo Z Float Rail is engineered for maximum performance for both the shooter and the rifle. This two-piece system is thinner than it is tall, making it lighter weight, more compact and easier to grip than other quad rails systems.



- Two piece 6061 T6 hard matte black anodized aluminum construction

- Thinner profile for enhanced forward control

- Easy installation without removing barrel

- Black hard anodized finish

- Includes Black ERGO LowPro Rail Covers

- Requires removal of delta ring

- Piston system compatible

- Weight: 14.6 ounces

Free Float AR15/M15 Rail System, Overshoot

Enter your ZIP code for an exact shipping cost on this item. Hazardous-materials fees, where they apply, are included in the total shown.

Read our full shipping policy

Firearms must ship to a licensed dealer (FFL), who completes the transfer and the required background check when you collect the item.

How FFL transfers work · Terms of sale · Product and legal restrictions