Originally posted by 320icar
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making 3 piece bbs style 19's
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as you already found out you need completely custom lips. Only style 5 barrels are interchangeable. RF/RS lips have 3cm smaller bolt circle so no matter what you can't use them. And the lips aren't your only problem. The style 19 (and 5) centerpiece doesn't have deep enough mounting groove for outer and inner lip. It is only designed to fit 1 piece barrel to it. So you need to machine that groove deeper or make another one to the other side of the centerpiece (as i did):
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