Single and Double Rib SL-9 Variants for HBPDW or Q Sliding Rails. Uses a bigger hoseclamp, a 10-32 grub screw in the rear and shortened rear takedown retainin pin spring min reduction the length of the grub screw, max is 10mm (the depth of the internal threads). This will self retain the rear takedown retaining pin and spring which is required for this specific brace/stock.
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