rangers mastered the art of using the M3 as a throwing knife), the M3's blade was criticized as being too narrow for rough usage, particularly for utility tasks such as opening ammo crates and food tins, while its edge was found to be somewhat difficult to sharpen. The blade's secondary edge was also criticized as being too short, limiting the knife's utility when used for backhand slashing strokes. Many features of the M3 were incorporated into the M4 bayonet for the M1 Carbine, the M5 bayonet for the M1 Garand, the M6 Bayonet for the M14 rifle, and finally the M7 bayonet for the M16 rifle. The M3 knife and all of these bayonets fit in the M8A1 scabbard, officially designated as the "Scabbard, Bayonet Knife, M8A1," with the National Stock Number (NSN) 1095-00-508-0339. Other fighting knives used by U.S. forces have sometimes been referred to as trench knives. These include the stiletto-shaped daggers carried by Marine Corps Raiders in World War II, and fighting-utility knives made by KA-BAR and other manufacturers. Reference literature Wolfgang Peter-Michel Author of: Grabendolche: Militärische Kampfmesser des Ersten Weltkriegs Frederick J. Stephens Author of: Fighting Knives: Illustrated Guide to Fighting Knives and Military Survival Weapons of the World'' Eugen von Halász: Deutsche Kampfmesser Band I. Militär-Verlag Klaus D. Patzwall, Norderstedt 1996, . Eugen von Halász: Deutsche Kampfmesser Band II. Militär-Verlag Klaus D. Patzwall, Melbeck 2009, . See also List of daggers Rondel dagger, similar blade to a trench knife. Combat knife Mark I trench knife BC-41 Trench raiding club Smatchet, derived from a trench knife. References External links Images Daggers Military knives World War I infantry weapons World War II infantry weapons Fist-load weapons