FX BARREL ATTACHMENT & LINER LOCK SET, MODEL .25/6.35

FX Barrel Attachment and Liner Lock Set By Huma-Air. 6.35MM /.25 CAL This barrel attachment and liner lock set allowes you to exchange the caliber of your FX rifle when you already have a matching transferport and probe for the specific caliber. The liner support o-rings are included, just like the internal and external o-rings for the attachment and liner lock