The NRA Sporter barrels were dated. Most will have a star guage mark on the muzzle. Some of the 1938 dated NRA Sporter barrels will not have the star on the muzzle but will have the star guage number on the bottome of the barrel, beneath the fore end. The M2 stocks all have the same heavy checkered buttplate bit lack the trap door found on the 1903 National Match Buttplates. NRA Sporters with 1.4 million+ serial numbers exist as I have one in my collection. I believe the last NRA Sporters were built by SA in 1934. I am sure information concerning that is available in some of my reference material but not worth looking up for this discussion. NRA Sporter barrels and other parts were available at least until 1938. The M2 stock will probably crack from the recoil of the .30 cal cartridge. The crossbolts in the 1903 stocks were put there for a purpose. If you will post, or email me, the complete serial number of the subject rifle I will see if it is on the SRS list as a Sporter. All NRA Sporters are not on the SRS list but a high percentage of them are. Congratulations on finding an interesting rifle.
