Bore-Up Cylinder For M4A1, XM177, SIG551, MC51

20.00

Out of stock

SKU: MDF-GU-01-03 Category: Brand: Modify (Taiwan)
Description

Bore-Up Cylinder Type 2 for M4A1, XM177, SIG551, MC51
– Material: Stainless Steel

– Ribbed Outer Surface for faster cooling

– For use with MODIFY / SYSTEMA Bore-Up series parts and spring rating higher than M120

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