https://old.en.tradesoft.fi/product/4272/prometheus-enhanced-hop-up-tensioner-h-model-2-hardnesses
Prometheus Enhanced Hop-Up Tensioner, H-Model (2 hardnesses) | Airsoft-kauppa Tradesoft -...
Prometheus enhanced hop-up tensioner is like a flat-hop tensioner. It is longer than a standard tensioner, which makes it press on the hop-up bucking more...
hop up