Taiwan Gun shows what improvements the Well Pro MB08AE Upgraded Version has in a range test. The replica boasts a stainless steel cylinder and piston, an aluminum 90° piston with a seal cup-type head, and a steel trigger assembly. These components, along with a standard APS2 9mm spring and a 90° trigger box with a new trigger type, allow the replica to accommodate M220 springs for up to 680 FPS.