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Ergo Grip Z Float Rail System - Carbine Length w/ Overshoot and A2 Front Sight Cut-Out Quad Rail 4813 4813-OS

Ergo Grip Z Float Rail System for AR-15/M16 - Overshoot Length, Black 4813-OS
Ergo Grip Z Free Float Overshoot Quad Rail for AR-15/M16, Black 4813-OS
Ergo Grip Z Float Rail System for AR-15/M16 - Overshoot Length, Black 4813-OS
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Ergo Grip Z Float Rail System for AR-15/M16 - Overshoot Length, Black 4813-OS
Ergo Grip Z Free Float Overshoot Quad Rail for AR-15/M16, Black 4813-OS
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Ergo Grip Z Free Float Overshoot Quad Rail for AR-15/M16, Black 4813-OS

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Questions & Answers
Is this the 10" overshoot rail version? whats the overall length of the rail? Expert Answer

Unfortunately, this product has been discontinued and we no longer have that information available. We recommend reaching out to the manufacturer for this inquiry. Their contact information can be found here: https://www.ergogrips.net/contact-us/.

by Tiffany S., Gear Expert, June 6, 2019
Will it fit a Adams piston operation on a 16 inch m4 berrel Expert Answer

Yes, these Ergo handguards will work with Adams Arms piston systems.

by Armando R., Gear Expert, August 3, 2018
View All Q&A You Have a Question? Ask!

Product Discontinued by Manufacturer

Ergo Grip Z Float Rail System - Carbine Length w/ Overshoot and A2 Front Sight Cut-Out Quad Rail 4813 has been discontinued by ERGO and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Weapon Accessories, Gun Parts, Picatinny Rail Sections yourself to try and find the perfect replacement for you!

Product Info for Ergo Grip Z Float Rail System - Carbine Length w/ Overshoot and A2 Front Sight Cut-Out Quad Rail 4813

The Ergo Grip Overshoot-Length Z Float Rail is a quad-rail system with a cutout at the front, made to accomodate the standard iron sights on AR15 and M16 rifles. This free-float two-piece rail mount gives you 4 Picatinny rails in a single unit, precisely designed for optimal performance, and machined from 6061 aircraft-grade aluminum with an anodized matte black finish. The Ergo Z Free Float Quad Rail, Overshoot Length has a reduced profile that translates into reduced weight and size, as well as a more comfortable grip than with other quad rails. The Ergo Z Free Float Overshoot Quad Rail system is compatible with piston systems.image

Features of ERGO Z Free-Float Rail System for AR15 with Overshoot and Iron Sight Cutout:

  • Cut-out at front - no need to remove standard iron sight
  • 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
  • Requires removal of delta ring
  • Piston system compatible
  • Weight: 12.2 ounces

Package Contents:

  • Ergo Grip Z Float Quad Rail System - Carbine Length with A2 Front Sight Cut-Out 4813

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Ergo Grip Z Float Rail System - Carbine Length w/ Overshoot and A2 Front Sight Cut-Out Quad Rail 4813 Unavailable & Discontinued Models

List of Unorderable Models

  • Ergo Grip Z-Rail Free Float AR-15/M16 Rail System Overshoot, Black 4813-OS , MPN: 4813-OS , UPC: 874748005104 , Code: 3E-T8-4813-OS
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Last updated 2026-08-23 UTC.