Upgrade your plastic spring guide with this Classic Army Metal Spring Guide. Plastic spring guides can break easily, especially on upgraded guns. If your gun is shooting above 320FPS with .20g BBs you absolutely need a metal spring guide. The metal spring guide will fit all of the Classic Army AEGs that utilize the quick spring change feature. This includes the Professional Line M4s, AK series, and SR25/M110s.
Buy Sell Trade info here. Possible future feature.