ULTIMATE Bearing Spring Guide - V.3 Shape_Stick-Type Under the ventilated backing is

Under the ventilated backing is a velcro-sealed compartment for a water bladder

Beautiful textured feel

This is the 150 SP version

otherwise 134a/144a is recommended

Quite a substantial scope ring

ULTIMATE Bearing Spring Guide - V.3 Shape_Stick-Type Under the ventilated backing isA high strength spring guide with full metal construction. Features steel bearings under a rotatable guide to minimise friction when the spring is compressed. This allows a higher fire rate to be sustained. The high strength construction allows for higher power setups with zero chance of guide breakage. Suitable for version 3 gearboxes. View our entire range of ULTIMATE parts here.