Remington 700 Long Action in .30-06, .270, something with a .470 bolt face, this will make it compatible with the .308 Winchester without anything more than a barrel swap. The barrel should be stainless steel, M24 contour, 24" OAL, with a standard Remington 700 dimensioned recoil lug. Dakota Arms supplied the bottom metal for the M24 and then Sunny Hill took over the contract. Use the factory magazine box, follower, and magazine spring. The Remington M24 trigger is rare and expensive if you do find it, you can find old style Remington triggers pretty easy or just drop in a Timney. HS Precision PST011 stock, make sure you order it for the M24 contour barrel. Early M24's used a one piece steel Leupold 0 MOA base and later models used two piece Mark 4 bases, also 0 MOA, which were drilled and tapped to 8-40. You can have the holes opened up and aligned if you want when you have the action worked on or just leave them 6-48, it's up to you. If it was me I'd just use a normal one piece 20 MOA base to make it more versatile across a range of optics. M24's were issued with the Harris HBL 9-13 bipod and then later the Advanced Sniper Accessory Kit came with the Harris HBRS, the HBRMS is preferred with its notched legs. That should get you on your way.