Lightweight shaft for GRK4/5 upper arm (R31S063) merch The fins on the top

The fins on the top 5 stages have been deepened

UX-CVD Extendable Steel CVD Allows the CVD to travel with the stroke on the dampers without a bind up

This is an optional part for Re-R HYBRID

Top-quality components: heat-resistant magnet

You can change it according to the setting and your favorite style

Lightweight shaft for GRK4/5 upper arm (R31S063) merch The fins on the topA lightweight type D cut type upper shaft compatible with GRK4 GRK5 upper arm is now available! This hard anodized product is made of aluminum, making it significantly lighter than a standard steel upper shaft. The total length of the shaft (including threads) is 34. 5mm, the same as the upper shaft used in the GRK5 front upper arm . Applicable upper arm GRK4 standard upper arm GRK5 standard upper arm (R31S301)PM upper arm (R31S063) Lightweight shaft