Hop Up Unit / Buckings
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GSF Airsoft AEG M4/M16 Metal Hop Up Chamber
GSF
$16.99The GSF Enhanced Hop Up Chamber for the M4/M16 Airsoft AEG is constructed from a high quality metal to ensure a proper air seal as well as a consistent pressure on the hop up bucking. GSF Airsoft parts are engineered for high performance and durability...$16.99