The M1903-A4 was a specifically designed sniper rifle that came as a result of early U.S. combat involvement in the Pacific. There was a high demand, that could not be filled, for telescopic (sniper) rifles. The Infantry Board and the Ordanance Department conducted an evaluation and recommended that the Weaver 2.5x 330C hunting telescope be adopted for use on M1903 and M1903-A1 rifles. The rifle was officially adopted on 14 Jan 1943 as the M1903-A4 (sniper).



The M1903-A4 was an accurate rifle with an effective range of about 600 yards (550m), with the main limit on long range accuracy coming from its very low power scope (2.5x). From its adoption in 1943 until the end of the war, the M1903-A4 was used extensively in every theater of operation by both the US Army and the USMC. The rifle was again used in the Korean conflict, and even in the early stages of the Vietnam conflict when sniper rifles were in severe shortage. The M1903A4 is a legendary classic sniper rifle. It served with distinction in WWII, Korea, and even Vietnam.


USMC M1903-A1/Unertl
Unlike the US Army, the USMC had a standard issue sniper rifle at the start of hostilities in WWII, it was a M1903/Lyman 5A (5x), which was adopted (with the Winchester A5 Telescope) during WWI. After there was a push to standardize sniper equipment, the Marine Corps Equipment Board did an extensive study of optics under field conditions and recommended a scope of about 8x, with an objective lens of about one and half inches, a medium fine crosshair reticle, and double micrometer quarter minute click mounts. They specifically cited a 8x target scope made by John Unertl as being the best they found. They also recommended the scope be mounted on a Winchester M70 target rifle, but the USMC decided on the M1903 based on favorable accuracy comparisons between specially selected M1903’s and the M70. So the M1903-A1 mounted with the Unertl 8x became the “sniping standard” in the USMC.


The M1903-A1/Unertl was tested and at 600 yards and with M72 Match ammo would group 3.5 inches (.58 MOA, wow!!!) but match ammo was about impossible to come by during the war, so most snipers had to settle with M2 Ball ammo, which was till respectable with groups coming in at 7.5″ at 600 yards (1.25 MOA). The M1903-A1/Unertl was used by the USMC through out WWII, along with the M1903-A4. The -A1/Unertl also saw use during the Korean war, with USMC snipers registering a number of kills out to 1000 yards. Like the M1903-A4 the M1903-A1/Unertl was a lethal system in the hands of a properly trained sniper during WWII and Korea.



Thanks to a loyal SC follower for the images.


Ken Dowen

When the 1903 Springfield was used as a sniper rifle, did the scope present any problems for the stripper clip? I’ve seen where there have been some detachable magazines for the rifle but they must be rare. Have you heard of or seen any of these? Thank you.

Mel Ewing

No, not on the 1903 springfields, there were not DBMs for them. Stripper clips were not usable on the 1903A4’s and 1903A1/Unertls as far as I understand it.

US M1C and M1D - Sniper Central

[…] June of 1944 the M1E7 (renamed M1C) was adopted as the standard issue sniper rifle and replaced the M1903A4 making it “Limited Standard”. The M1E8 (renamed M1D) was adopted in September of 1944 […]


I have the ’03A1 Rifle w/UNERTL USMC Scope..
Scope is #2070… Does not have the DOT.. Must have gone in for repairs just after Korea..
Came from USMB – Pendleton about 1975..
Is like new..w/Micarta case.


I have a 1903A4 that my dad gave me. It sat in a box in the rafters in his garage for well over 40 years. A few years ago he had me climb on a ladder and pull it down. I dusted off the box and the original shipping label from Utah was on it. My aunt (dad’s sister) worked at the Army Ordnance in southern Colorado. In the 60’s she was able to order a 1903 and gave it to my dad, who put it away and never touched it. I took it to a popular gun store in the Denver area, and when I walked in with the box and opened it, everybody in the store froze. It was pretty cool, especially because I had the box, with a shipping label, with my aunt’s name (same surname as mine). I asked them to clean it up. The guys were actually honored to perform the service. It is now locked up safely pulled out on occasion.

malcolm e hayes

enjoyed the chats about the o3a4, i got one from the dcm but i have never fired it. it came complete with the weaver i guess scope, it looks new and the stock is not w well sanded stock which i was told was correct. what i need now is the dementions of placement and size of scope bases to add a unertl scope. i also have a m1 c and a mi d and extra mounts and scopes for these rifles with the prong and cone flash hiders for my kids when i buy the farm. sure would appreciate the help. semper fi


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