Possum Hollow Bore Guides - The Rock Without Prosthetic Foreheadfav Page Create Possum hollow bore guide 66โ this model is designed for sako rifles chambered in. 223 remington. Its robust construction and precise fit guarantee a reliable cleaning. We are currently phasing out the possum hollow bore guides and replacing them with our own au made custom guides. They have an aluminum body, with acetyl calibre snout and body. This bore guide is designed to fit the following actions and cartridges:
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