It is a custom made job on a Rem. XR action with a Lilja barrel cut to 18 inches, crowned, threaded for the "can" and a Jewell trigger set for appx 1 1/2 pounds.
Had a local gunsmith who has an excellent rep. around here build it for me and I could not be happier- he got it out on time(less than 3 months total and 2 of it was waiting for the barrel) Fair price and an overall nice guy.
Even had him build me a sweet 223 on another Rem 700 BDL action he had laying around (didn't even charge me for the action) used the barrel that came with the 223 XR (already paid for) used the Rem trigger set up(already paid for) and had him pillar bed it, crown the barrel and it too shoots far better than I can on most days.
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Gary