Short Base Beretta Replacement Comb Adjuster - AutoShort Base Beretta Replacement Comb Adjuster Auto Two part drop in replacement system. No drilling or new holes or screws required. The 4 way adjustable comb system is made from T6061T6 finished in anodized silver. Top section is 0. 398 x 1 x 4 with 3 stainless steel flat head hex socket clamping screws that tighten around the 2 3 8 stainless steel adjusting posts located on the base plate Base plate is 1 8" x 1 1 16 x 3 3 8 6061T6 with engraved