CowCow B01 Dynamic BlowBack Unit - Silver

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CowCow B01 Dynamic BlowBack Unit - Silver

A Great Blowback Unit, we have personally been running these for years.

Unlike the B02 (Piston Head Version) these come with O-rings which are far easier to achieve good seals to your nozzle. 

We use these with the AIP nozzles and work flawlessly

Will fit 5.1 and 4.3 variants, includes 3 different size O-rings

Don't forget to pick up some spare Nozzle Springs too, you will need them - trust me!