Zparts feature their URGI/MK16 G-Style Handguard that can ba used on GHK, KJ, KSC/KWA, MARUI, SYSTEMA, VFC, VIPER, and WE AR-style airsoft rifles. According to them the MK16 Handguard is precision machined using 6061 Aluminum, Barrel Nut using 7075 Aluminum and the MK16 Barrel Nut is finished in hardcoat anodized.

This URGI/MK16 Kit from RA-Tech should make owners of M4 Gas Blowback Rifles happy as there are versions for most types of GBB tech, whether it be from Marui, WE Airsoft, GHK Airsoft, or KWA. Though it seems they forgot the Western Arms system which is the first M4 GBB tech and is used for G&P and Jing Gong M4 Gas blowbacks.

You can order these at the Airsoft Taiwan online store.

Garand Thumb features Geissele URGI AR-15 upper receiver in this video. The URGI stands for the "Upper Receiver Group Improved" that is now being introducted into service at the United States Army Special Operations Commans (USASOC) and has improvements over the standard Mil-Spec M4 upper. The Giessele URGI is a "near clone" of that URGI of the USASOC according to Brownells.