SniperMechanics - FPS Power Rings

Looking to tweak your power? These steel power-up rings are an easy way to increase spring pre-load. Designed for 13mm springs and 9mm guides.

Supplied as a 3-piece set in 2mm / 4mm / 6mm sizes. They work on most 9mm guides and with most springs — how many you can use depends on the spring's compression length. Made from steel with a black-oxide coating for longevity and better lubricant retention.