A PolarStar Hop Up Thing thing 5% elastane (fabric composition may

5% elastane (fabric composition may vary by 1%)

The UGS is installed into the VFC HK417 in the same manner as the original buffer tube by threading into the receiver

This allows the Fusion Engine™ to have the widest velocity adjustment range of any of our systems

It also has a microswitch on the back which interfaces with the rifle's selector controls

Includes delrin spacer with steel nut

A PolarStar Hop Up Thing thing 5% elastane (fabric composition mayPolarStar Hop Up Thing Bet you cant guess what this Thing is for. Its a hop up, or a paperweight, or maybe a very expensive fidget spinner, but were pretty sure its a hop up. Actually, it's a 6061 T6 Aircraft Aluminum hop up. We know, "Aircraft Grade" is the favorite buzzword of every airsoft company trying to make a $15 part sound like it belongs on a SpaceX rocket. But we actually machine these Things in house at PolarStar to + 0. 002" tolerances