For smoother gear rotations, Krytac 8mm Ball Bearings made out of Japanese Steel Grade have been added. Internally, the stock motor has been replaced with a Lonex A1 motor for a higher rate of fire and trigger response.

Additionally the added Magpul stock allows for better comfort and functionality.

Also included are micro backup sights which are very low profile and do not interfere with other accessories. Included are two 5-slot keymod rail sections and one 10-slot keymod rail section which will allow you to mount accessories like lights and lasers right out of the box. The SR-16E3 comes with extra accessories for added better value. You can add rail sections or Keymod specific accessories that will mount directly to the rail system for an even more streamlined look. Keymod rail systems are modular handguards that allow placement of accessories with simple tools in seconds. The SR-16E3 features the Knight's URX4 Keymod rail system. This Airsoft GI Custom is built off the Knight's Armament SR-16 by Echo 1.

Knights armament keymod accessories