M1 Carbine Magazines
.30 Carbine • WWII Heritage • 15 & 30 Round Banana • Mil-Spec
Mil-spec magazines for the M1 Carbine — the lightweight semi-automatic rifle in .30 Carbine that became the most widely produced American small arm of World War II (6.1 million manufactured), served through Korea and Vietnam, and remains one of the most beloved collector and shooting rifles on the US market. Our house-brand magazines include the original 15-round straight box, the 30-round curved "banana" magazine introduced with the M2 Carbine in 1944, state-compliant 10-round versions, and the authentic 1943 canvas magazine pouch.
M1 Carbine Magazines at Keep Shooting
Keep Shooting carries mil-spec M1 Carbine magazines built to original US military specification — the 15-round straight box magazine issued with the Winchester-designed M1 from 1941, the 30-round curved "banana" magazine introduced with the select-fire M2 Carbine in 1944, state-compliant 10-round versions, and the authentic 1943-pattern canvas magazine pouch. Our magazines are our own house-brand production manufactured to the original USGI dimensional and spring-tension specification, making them compatible with every WWII-manufactured M1 Carbine from Inland, Winchester, Underwood, IBM, Rock-Ola, and Standard Products, as well as post-war Inland Manufacturing, Auto-Ordnance, and Universal-pattern commercial M1 Carbines.
The M1 Carbine is one of the most historically significant American firearms ever produced. In June 1940, with Europe already at war and the US military preparing for likely involvement, the Army proposed a lightweight semi-automatic rifle for rear-echelon and support personnel — military police, medics, officers, mortar crews, and vehicle operators who needed something more capable than a handgun but lighter than the M1 Garand battle rifle. Winchester entered the competition in September 1941 with a prototype famously developed in just thirteen days, built around David Marshall Williams' short-stroke gas piston design (Williams himself had developed the principle while incarcerated in a North Carolina prison, one of the most unusual biographies in American firearms engineering). Winchester's carbine was adopted in late 1941 and entered mass production in 1942.
Over the next four years, American industry produced more than 6.1 million M1 Carbines — making it the single most-produced American small arm of the Second World War, outnumbering the M1 Garand by nearly two to one. The largest producer was the Inland Division of General Motors in Dayton, Ohio (2.6 million carbines), followed by Winchester Repeating Arms (828,000) and the Underwood Elliott Fisher Typewriter Company (545,000). Additional contractors included IBM, Rock-Ola Manufacturing (the jukebox company), Saginaw Steering Gear, and National Postal Meter — a remarkable cross-section of American industry turned over to wartime small-arms production. Every one of those 6.1 million carbines was designed around Winchester's .30 Carbine cartridge: a rimless straight-walled round based on the .32 Winchester Self-Loading, firing a 110-grain bullet at approximately 1,990 feet per second for 967 ft-lbs of muzzle energy — substantially more potent than a .45 ACP handgun but significantly less than a .30-06 rifle, exactly filling the intermediate-cartridge niche the original specification had called for.
The M1 Carbine was issued with a 15-round straight box magazine throughout WWII. When the select-fire M2 Carbine was adopted in October 1944, it brought with it the 30-round curved magazine — universally known as the "banana mag" for its pronounced curvature — and 30-round production kicked off in 1945. After WWII, the 30-round magazine quickly became the standard-issue magazine for both the M1 and M2 Carbines, and both capacities continued in service through the Korean War and into the Vietnam War era, where M1 Carbines were widely issued to South Vietnamese (ARVN) forces and to US advisors early in the conflict. The 15-round magazine remained in parallel service until the end of Vietnam, giving the original straight-box design a service life spanning almost exactly thirty years.
Important magazine-catch note for 30-round magazines: Early-production M1 Carbines — the vast majority of WWII-era rifles — were manufactured with the original Type I or Type II magazine catch, which was designed only for the 15-round magazine and does NOT reliably retain the heavier 30-round banana magazine. A loaded 30-round mag in an early M1 Carbine will typically slant forward (causing feed stoppages) or fall completely out of the rifle under recoil. The fix is the Type IV magazine catch — developed for the M2 Carbine and retrofitted to late-production M1s — which has a secondary retention tab that engages the 30-round magazine's additional lug. If you intend to run our 30-Round Magazine in a WWII-production M1 Carbine, verify that your rifle has been updated to a Type IV magazine catch; if not, the 15-round magazine is the correct choice for original-configuration historical rifles. This is a real compatibility issue that frequently catches M1 Carbine collectors by surprise, and it is worth thinking through before ordering.
The M1 Carbine 1943 Mag Pouch is our authentic WWII-pattern canvas web magazine pouch — the same buttstock-mounted or belt-mounted double- magazine pouch issued across the US military from 1943 through the end of the war. The 1943-pattern pouch holds two 15-round magazines, attaches via a double-snap strap to the M1 Carbine's buttstock or to a standard US cartridge belt, and is the correct period accessory for a WWII-displayed M1 Carbine. It is constructed of OD #7 cotton web fabric with brass snap hardware, matching original wartime production.
State capacity restrictions apply: Fourteen US states plus the District of Columbia restrict magazine capacity under state law. Most cap at 10 rounds (California, Connecticut, Hawaii, Maryland, Massachusetts, New Jersey, New York, Vermont rifle, Washington, DC); Colorado caps at 15; Delaware caps at 17. Customers in 10-round states should order our 10-Round Magazine. Customers in 15-round and 17-round states can legally run the 15-Round Mil-Spec magazine. The 30-round banana magazine is restricted in all 10-round and 15-round states. Customers are responsible for verifying their local magazine-capacity law before ordering.
For .30 Carbine ammunition to feed the M1, see the Aguila Ammunition brand page for 110-grain FMJ production, and our full Rifle Magazines hub for other semi-auto carbine platforms.
Keep Shooting ships all M1 Carbine magazines and accessories from our Pennsylvania warehouse with free shipping on orders over $49.95 and hassle-free returns. Whether you are restoring a GI-bringback WWII M1 Carbine, maintaining a post-war commercial rifle from Auto-Ordnance, Universal, or Plainfield, shooting a modern Inland Manufacturing M1 reproduction, or assembling a period-correct WWII or Korean War living-history loadout, every magazine in our catalog is built to original USGI mil-spec and backed by our standard return policy.
Frequently Asked Questions — M1 Carbine Mags
Keep Shooting carries a wide selection of M1 Carbine Mags products from trusted brands. Browse our catalog to see the full range, and use the filters on the left to narrow by brand, price, or product type.
Yes! All orders over $49.95 qualify for free shipping, including M1 Carbine Mags products. Orders typically ship within 1–2 business days.
Keep Shooting offers hassle-free returns on M1 Carbine Mags products. If you're not completely satisfied, contact our customer service team for a return authorization. All products must be in original, unused condition.
If you need help choosing the right M1 Carbine Mags product, our team is available to assist. Check individual product descriptions for detailed specifications, or contact us directly and we'll help you find the best fit for your needs.