.50 Cal Muzzleloader Internal Bore Guide

This .50 caliber muzzleloader bore guide is designed to fit inside the muzzle, not over the barrel, ensuring precise ramrod alignment while fully protecting the crown during loading and cleaning.The design uses a two-material system:A rigid PETG inner core for straight, durable ramrod guidanceA flexible TPU outer sleeve that centers the guide in the bore and provides a soft, non-marring interface with the muzzleUnlike over-the-barrel guides, this design rests directly on the crown via an integrated TPU flange, keeping pressure off the barrel exterior and ensuring repeatable alignment. The PETG retention flange locks into the TPU sleeve for mechanical retention—no glue required.This guide was designed, printed, and test-fit on an actual .50 caliber muzzleloader and confirmed to work properly with a removable ramrod and threaded jag.Key FeaturesInternal-fit design for .50 caliber muzzleloadersProtects flat muzzle crowns during loading and cleaningPETG core for rigidity and straight ramro