JanSport, Jansport - Carson Reg All External Frame Backpacks >>> External Frame Backpacks by JanSport More details and ordering info. A great weekend External Frame pack, the Carson Reg has a capacity of 4900 cu. In. and a pack weight of 5 lb. 3 oz. (empty). Also available in Tall size (266746). User input on Jansport - Carson Reg by JanSport: Be the first to submit input on this product Submit Input: Your Name: Write or Paste Input here: Upload picture:      Review Guidelines