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Maxx Model M4P Pro Hop Up Chamber HPA Polarstar Factory Replacement Parts (OEM) 5 hoursBB Compatibility: Supports Non tracer 5 hoursBB Compatibility: Supports Non tracer BBs Height: 9” The Hopup Chamber M4P unit is designed to accept the nozzle length on M4 HPA Polarstar Engines Requires Wearing eye protection is recommended Use proper tools for disassembly and reassembly the gear box with great care due to spring tension Bearing lubricant oil grease is recommended for smooth operation
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