Editing M1 carbine (section)

===Magazines===
The M1 carbine entered service with a standard straight 15-round box magazine. The introduction of the select-fire M2 carbine in October 1944<ref name="rjmilitaria.com">{{cite web|url=http://www.rjmilitaria.com/m1carbine.htm|title= The M1 carbine – short history|publisher=RJ Militaria|access-date=29 October 2015|archive-url=https://web.archive.org/web/20230425135736/https://www.rjmilitaria.com/the-m1-carbine-a-brief-history/|archive-date= 25 April 2023}}</ref> also brought into service the curved 30-round box magazine or "[[Banana clip|Banana Clip]]".<ref name="Rottman_Marines">{{cite book |title=US Marine Corps 1941–45|url=https://ospreypublishing.com/us-marine-corps-1941-45  |author1=Rottman, Gordon L.| publisher=Osprey Publishing |date=15 May 1995|page=14}}</ref> After WWII, the 30-round magazine quickly became the standard magazine for both the M1 and M2 carbines, although the 15-round magazine remained in service until the end of the [[Vietnam War]].<ref name="Rottman_Green">{{cite book |url=https://www.amazon.com/Green-Beret-in-Vietnam-1957-73/dp/B001W0SF22/ref=tmm_hrd_swatch_0?_encoding=UTF8&qid=&sr= |title=Green Beret in Vietnam: 1957–73|author1=Rottman, Gordon L.|publisher=Osprey Publishing |isbn=978-1-78200-051-8 |date=20 June 2012 |page=41}}</ref>

Perhaps the most common accessory used on the M1 carbine was a standard magazine belt pouch that was slid over the stock and held two extra 15-round magazines. This field adaptation was never officially approved but proved an efficient method to supply extra ammunition in combat. After the introduction of the 30-round magazine, it was common for troops to tape two 30-round magazines together, a practice that became known as "[[Jungle style (firearm magazines)|jungle style]]". This led the military to introduce the "Holder, Magazine T3-A1" also called the "jungle clip", a metal clamp that held two magazines together without the need for tape.<ref>{{cite book|title=The M1 Carbine|author= Leroy Thompson|page=57|isbn=978-1-84908-619-6|year=2011|publisher= Bloomsbury USA}}</ref>

The 30-round magazines introduced for use with the selective-fire M2 carbine would not be reliably retained by the magazine catch made for the original M1 carbine which was designed to retain a 15-round magazine, so the much heavier 30-round magazine would not be properly seated in the M1 carbine magazine well. The loaded 30-round magazine would typically slant (impairing feed reliability) or even fall out, which contributed to the poor reliability record of the 30-round magazines. Because of their thin steel construction, they were also more prone to damage due to their added length and weight when loaded. In response to these issues, early production M1 carbines had to be fitted with the type IV magazine catch used on the M2 carbine (and late production M1 carbines) if they were to be used with 30-round magazines in order to ensure reliable loading and feeding. The type IV magazine catch has a leg on the left side to correspond with the additional nub on the 30-round magazines.<ref>{{cite web|url=http://forums.thecmp.org/showthread.php?t=5377 |title=Carbine magazine catches |publisher=Civilian Marksmanship Program|date=January 2010 |access-date=10 February 2016}}</ref>

Initial combat reports noted that the M1 carbine's magazine release button was often mistaken for the safety button while under fire.<ref name="Leroy_M1"/> When this occurred, pressing the magazine release caused the loaded magazine to drop, while the safety remained in the ''off'' position. As a result, the push-button safety was redesigned using a rotating lever.<ref name="Leroy_M1"/><ref name="M1_Warrior">{{cite magazine |url=http://www.gunsandammo.com/blogs/history-books/m1-carbine-americas-unlikely-warrior/|magazine=Guns & Ammo|title=M1 Carbine: America's Unlikely Warrior|author1=James, Garry|date=6 October 2014|quote=The M1 carbine (M1A1 shown) was one of America's most widely used arms in three major conflicts and a popular lend/lease item to Allied countries.|archive-url=https://web.archive.org/web/20230109173307/https://www.gunsandammo.com/editorial/m1-carbine-americas-unlikely-warrior/249858|archive-date= 9 January 2023}}</ref>