Muzzleloader Mag-Spark Nipple Thread Size 1/4 by 28

The Mag-Spark uses regular shotshell primers and is used to safely eliminate misfires, slow fires, and deadly hang fires; works well with all propellants in any weather, and helps prevent blowback.

Not sure what size to buy? Call us at (419) 736-3530 with your make and model so we can tell you.