Argon Keymod Rail

The Argon Keymod Rail features a slim profile for improved ergonomics and oversized cutouts for our lightest rail system yet. With a static top rail optimized for mounting optics and multiple contact points for a hex key mounted modular rail system on the sides and bottom, the Argon Rail is the ideal solution for any AR15 owner looking to shed some pounds from their rifle, and gain some mission flexibility. It uses a hex key secured barrel nut clamp and proprietary barrel nut for even more weight savings and easy installation.


FREELOK Clamping System  US. PAT. NO. 9,389,043 B1
The Argon Keymod Rail features a non-indexing barrel nut and clamping system (FREELOK) that utilizes free floating tabs to secure the rail to the receiver. FREELOK provides both frictional and mechanical locking forces to create a rock-solid bond between the rail and barrel nut.


For your safety, Trinity Force recommends this part be installed by a competent, qualified gunsmith/installer with an understanding of the weapon platform that the part is being installed on. Always make sure the firearm is unloaded and pointed in a safe direction when working.

SKU: N/A Category:
Weight (oz)

11.7, 13.5, 14.3

Length (in)

12, 15, 16.5

Width (in)


Height (in)


Inner Diameter (in)


Type of Aluminum


Coating Type

Hard Coat Anodized Finish

Interface Type

KeyMod, MIL-STD-1913