I recently purchased a 1903 Mk 1 with really nice metal but the stock was from a 1903A3 (no finger grooves) and the action was really, really loose in it. I learned the CMP offered some walnut finger groove reproduction stocks (made by Boyds) so I bought one. I can highly recommend them, however they are pricey - $170. The rifle now shoots much smaller groups off a rest (1.5"@100 yards vs 3"@ 100 yards) with CMP ammo. Photos of the rifle in the new stock are attached.