The Guarder LM4 Hop Up Bucking (GB-01-03) is an upgraded hop up packing for the KWA LM4 and compatible gas blowback M4s. The 70 degree material is resistant to temperature changes to provide consistent performance.
Guarder LM4 Hop Up Bucking Features:
-70 Degree Silicone Material
-KWA LM4 Compatible