VFC M4/416 "Ion" Winter Recoil Spring AIP Hop-up unit made of durable

Hop-up unit made of durable Polycarbonate material

Useful volume 22

This stock will not only make your sniper look cool but also make your VSR-10 feel less like a toy due to its robust build and usefull reinforcements used to create an amazing upgrade from your standard stock

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may need to purchase upgrade kit to have all possibilities

VFC M4/416 "Ion" Winter Recoil Spring AIP Hop-up unit made of durableThe One Spring You Need For Efficiency All Year Round Boost your GBBRs performance year round with the Waldo Dynamics Winter Recoil Spring, precision engineered for the VFC 416 and M4 GBB platforms. Designed at 85% strength, this recoil spring delivers the perfect balance between efficiency and snappiness (making it ideal for cold weather use without compromising reliable cycling in warmer conditions). The reduced tension improves gas efficiency,