King Arms' latest product in collaboration with EMG is the full metal EMG SI AEG series w/ GRIDLOK® LITE 8.5"/11"/15" Rail for AR-15. The SI OPPRESSOR Flash/tracer unit series is compatible with this rail. The receiver is engraved with the authorized marking of Strike Industry (SI) and comes equipped with an SI authorized GRIDLOK LITE Rail and an SI 250 rounds Mid-cap magazine.

Somebody make an airsoft version of this rail system from Strike Industries... "The Strike Industries GRIDLOK® LITE Rail for AR-15 takes innovation from GRIDLOK® but this is a 1-piece design to minimize weight and offer a cost-effective option. Using the same Patent Pending Quick Rail Detach system, only one of very few handguards on the market today that can be removed at home or in the field quickly without tools.