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Home Shop ERGO Grips AR-15 AR-15 Rail Systems KeyMod Rail Systems ERGO KEYMOD MODULAR FREE FLOAT RAIL SYSTEM
ERGO KEYMOD MOSSBERG 12-GAUGE RAIL $74.50
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ERGO KEYMOD SUPERLITE™ MODULAR FREE FLOAT RAIL SYSTEM $69.50 – $114.50

ERGO KEYMOD MODULAR FREE FLOAT RAIL SYSTEM

WARNING

$101.50 – $123.50

Comes standard with a 3-pack of KeyMod™ or M-LOK® Compatible Rail covers in black and an 18 slot ladder in black for the Picatinny Rail.

6061 T6 Construction, Type III Black Hard-Coat Anodized CNC machined lightweight one piece free float design 

Aluminum barrel nut allows mounting of up to 1” diameter barrels

12″ Version Weighs 11 ounces

15″ Version Weighs 14 ounces

  • KeyMod design to accept Ergo and all other KeyMod Accessories
  • Accepts Ergo WedgeLok®; Slot Covers
  • Aluminum Barrel Nut included
  • Full length, scalloped Mil-Spec 1913 Picatinny top rail
  • 1.8” inside diameter to accept most suppressors
  • For AR-15/M16 platforms (Not AR-10, SR25, etc…)
  • Uses standard barrel nut wrench

Made in the USA

For best installation, we suggest using the 3/32 Wrench

Purchase Replacement Screws

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SKU: 4817 Categories: AR-15 Rail Systems, KeyMod Rail Systems
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Description

INSTALLATION (Download instructions by clicking here)

Installation instructions

Tools required:
USGI barrel nut wrench
3/32” Allen Wrench

1. Clean and inspect upper receiver, barrel and barrel nut.
2. Place receiver in proper vise block.
3. Coat threads with grease or anti seize compound.
4. Install barrel into receiver. Be sure to align indexing pin with slot in upper receiver.
5. Slip barrel nut over barrel and thread onto upper receiver hand tight.
6. Using a standard USGI barrel nut wrench, torque nut to 30-50
ft-lbs. Check alignment of gas tube hole in upper receiver. You
may need to loosen and tighten nut once or twice to get proper
alignment and torque.
7. Install gas tube and gas block, per proper instructions.
8. Slip handguard over barrel and gas block.
9. Align screw holes in handguard with holes in barrel nut.
10. Start all screws before tightening any of them. We recommend blue thread locking compound.
11. Make sure everything is aligned properly and installed correctly.
12. Tighten all screws.
13. Enjoy your new, state of the art handguard.

Comes with a Barrel Nut & Hardware, but if you need a replacement Barrel Nut and Hardware – please click here to purchase.

Additional information
Weight 0.87 lbs
Dimensions 10 × 2.5 × 16 in
Length

9", 12", 15"

Brand

Brand

ERGO

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ERGO MODULAR FREE FLOAT RAIL SYSTEM

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$96.50 – $164.99
Comes standard with a 3-pack of KeyMod™ or M-LOK® Compatible Rail covers in black and an 18 slot ladder in black for the Picatinny Rail.

6061 T6 Construction, Type III  Black Hard-Coat Anodized.  CNC machined lightweight one piece free float design.  Aluminum barrel nut allows mounting of up to 1” diameter barrels.

9" Version Weighs 8 ounces

12" Version Weighs 11 ounces

15" Version Weighs 14 ounces

  • M-LOK® Slots accept ERGO and all other M-LOK® accessories
  • Aluminum Barrel Nut included
  • Accepts Ergo WedgeLok®; Rail Covers
  • Full length, scalloped Mil-Spec 1913 Picatinny top rail
  • 1.8” inside diameter to accept most suppressors
  • For AR-15/M16 platforms (Not AR-10, SR25, etc…)
  • Uses standard barrel nut wrench

Made in the USA. Made to Magpul™ M-LOK® specifications

For best installation, we suggest using the 3/32 Wrench Purchase Replacement Screws
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Replacement Large Diameter Barrel Nut for your ERGO Modular Free Float Rail System. Comes with replacement hardware for installation.
  • Fits:
    • ERGO KEYMOD MODULAR FREE FLOAT RAIL SYSTEM (SKU 4817)
    • ERGO M-LOK® COMPATIBLE MODULAR FREE FLOAT RAIL SYSTEM (SKU 4818)
A barrel nut is included with your Free Float Rail System, this is a replacement barrel nut. Does not fit small diameter ERGO SUPERLITE™ Series Rail Systems. If you own a SUPERLITE™ Series, please click here for the correct replacement barrel nut. Important: Only fits the current generation of handguards that have the ERGO logo on the sides of the Rail System. If your handguard says ERGO GRIP on the side, these will not work with them. Please contact us for replacement parts.
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ERGUNS MARKETPLACE

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ERGUNS & ERGO Industries, are Subdivisions of ERGO Group, LLC.
2215 U.S. Rte 66,
Moriarty, NM 87035

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1-877-281-3783

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Friday: 8am - 3pm MST

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