Check out the E&C SOPMOD Series At Vincent's Hobby Shop in the Philippines. The series feature a free-float aluminum handguard with a Picatinny/RIS rail system, a long top rail for accessory mounting, and M4-compatible aluminum receivers with an anodized finish for corrosion resistance. The comfortable polymer stock houses the battery, and the barrel has a 14mm CCW thread for muzzle devices. Flip-up iron sights are included, and the East Crane gearbox boasts 8mm ball bearings, reinforced metal gears, a lightweight polymer piston with steel teeth, an aluminum piston head, a polymer nozzle, and a quick-change spring system.