hey all, i was considering putting an x valve in my classic mag but dont have the money so ive been looking at some less expensive retro valves... will the retro or rt pro valve work/fit in my classic mag? also..are there any differences in the two valves other than weight? and even if the rt valve is heavier can you not reach the same rate of fire with a lvl x? please feel free to share any knowledge you may have on this subject with me.
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