Poly Choke ribs are attached with an elastomeric adhesive. The rib blank is contour milled to match the barrel before it is glued in place. It can be removed without damaging the barrel blue according to an article in Gunsmith Kinks III. Remove all sight beads. Pry up one end of the rib and insert a piece of plastic package strapping in the gap. Work the strapping back and forth in a sawing motion and move down the rib.

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