ERGO Modular KeyMod Free Float Rail System


6061 T6 Construction, Type III Class 2 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
  • 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

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.

Additional information

Weight 0.87 lbs
Dimensions 10 x 2.5 x 16 in

9", 12", 15"


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