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If you want to read-barrel the best solution is to have 100 thou machined off the face of the receiver to remove the small progression. You can then have an integrated recoil lug fitted and bed the action to hold everything in place.
Long Rifles Inc in SD did mine and the workmanship is superb. Mine's a .300 Win Mag with a Bartlein light Palma 1:10 barrel and LRI's own recoil lug, with an integrated muzzle brake. I bedded it myself into a McMillan A3 and also inlet for an Atlasworxs LA DBM, which is compatible with AI mags.
If you want an M24 profile barrel, I would bed an inch or more of the barrel parallel beyond the lug to help support the weight of the barrel and decrease the risk of stressing the receiver.
