Important Notice for Our U.S. Customers

he United States has suspended its duty-free de minimis treatment for all countries, effective August 29, 2025, meaning low-value shipments (previously under $800) will now be subject to all applicable duties and taxes.

By acknowledging this notice, you agree to accept responsibility for any customs duties, taxes, or tariffs imposed on your order. Please note that we cannot accept "non-payment of taxes" as a valid reason for order rejection.
We appreciate your understanding and continued support. Customer have any questions, Please do not hesitate to contact us.

5KU  |  SKU: 5KU-154

5KU TJ Competition Series Rail Handguard for M4 Series

$39.00 USD $55.00
Length: 235毫米卡賓槍切割

Delivery and Shipping

In Stock Item Process Within 24 Hours.


Manufacturer: 5KU
SKU: 5KU-154 5KU-155 5KU-156 5KU-157

  • CNC Aluminum construction
  • Free floating design no need barrel block or sight to be installed
  • Upper rail opener to perfect fit the standard M4 carbine with front sight installed
  • Suitable for Marui / WA AR M4 series or similar spec