This is a Model 1903 Mark I with S stock Springfield Armory 1123612.

The barrel of this rifle is SA barrel dated 9-19 with visible proof marking. The muzzle reading is 1 and the throat reading is 2.5. The Bore of this rifle is in good condition with little rust/pitting. The barrel is a Four-grooved barrel. A "H" is stamped on the bayonet lug. A proof mark and EHD cartouche appear on the stock. "J5" is stamped on the bolt.

Other Information: "During World War I, the United States secretly developed the Pedersen device attachment for the M1903 Springfield rifle that allowed it to fire a .30 caliber (7.62 mm) pistol type cartridge in semi-automatic mode.This attachment was developed to allow an infantryman to convert "his rifle to a form of submachine gun or automatic rifle" in approximately 15 seconds." This rifle has the cutout where the magazine would have attached.

Disclaimer: ******(This does NOT give the rifle the ability to be full auto. )*******

Production of the Pedersen device and modified M1903 rifles started during 1918.

Notes from the Armorer:

Mark I rifle assembled from and original barreled receiver that appears to have the original and complete MK I parts: Trigger sear; magazine cut off + special screw; cut off spindle and special plunger. Bolt is a curved handle J5. Barrel is aSA 9-19. Bore is shiny and bright with little wear in the rifling. Muzzle is excellent. Stock is an original MK I stock with a boxed EHD cartouche; single block P proof with a 71 in front of the magazine and a 30 or 38 in front of proof mark. The stock has no rebuild stamps. The barrel and receiver have a US arsenal dark charcoal parkerized refinish. 

Sold as is.

All photos can be viewed here.