Oversize Knob For Fast, Positive Action Cycling; Installs With Or Without Adapter Stud For Desired Look & Feel
Unique, 2-piece, bolt knob conversion gives the tactical rifle builder the flexibility to extend the overall bolt handle length for maximum leverage, or to maintain near factory length for minimal bulk or weight increase. Installation is fast and easy – simply cut off the factory bolt knob, drill the cut end of the bolt handle shank, TIG weld or silver solder the pre-threaded adapter stud in place, and screw-on the tactical knob. Increases overall bolt handle length by up to 1" for added leverage and to prevent the trigger finger from hitting the bolt knob when shouldering the rifle. For minimal length increase, turn and thread the bolt handle shank for 5/16"-18 tpi and screw-on the knob. Oversize, tapered knob is machined from 6061 T-6 aluminum for maximum strength with minimal weight increase. Available with Birdsong’s satin non-reflective Black-T tactical finish.
Big Book Catalog, Issue:73, Page:164
Big Book Catalog, Issue:73, Page:230
SPECS: Knob - 6061 T-6 aluminum, hard-anodized, hard-anodized with satin non-reflective Black-T coating. Adapter Stud - Chrome moly, in-the-white. 1-1⁄16" (2.7cm) long, O.D. tapers 1” (2.5cm) to 7⁄16" (1.1cm), 5⁄16"-18 tpi. 1.5 oz. (42.5g) wt. Gunsmith installation recommended.