Birchwood Casey Muzzle Guard Set 17 to 30 Caliber 3 Piece Brass. 17 to .30 caliber firearms and are a vital accessory for any shooter. The brass muzzle guard inserts easily into a firearms chamber and helps protect the crown bore and other internal components from damage that may occur during firearm cleaning. This is essential for the protection of some firearms that are more commonly used with the muzzle end as opposed to the breach end. This Birchwood Casey Cleaning Kit make it easier for protection of certain firearms that prefer to clean from the muzzle end opposed to from the breach end. This is a Birchwood Casey specialty item that will help safeguard your favorite firearms. Specifications for Birchwood Casey Muzzle Guard Sets: Manufacturer: Birchwood Casey Color: Multicolor Quantity: 1 Projectile Caliber: .17 Caliber .30 Caliber Gun Type: Rifle Features of Birchwood Casey Muzzle Guard Sets Fit .17 to .30 caliber firearms Brass muzzle guard set Protects crown while cleaning from muzzle Makes easier for protection of certain firearms that prefer to clean from muzzle end opposed to cleaning from the breach Package Contents: Birchwood Casey Muzzle Guard Sets Birchwood Casey BC-41505: Muzzle Guard Set 17 to 30 Caliber 3 Piece Brass