page_title: CAR-15
section_title: GUU-5/P
hierarchical_section_title: CAR-15 / Post-Vietnam / M16 Carbine (AKA: CAR-15) / GUU-5/P
caption_attribution_description: GUU-5P Carbine Primary function: Anti-personnel and light materiel targets. Length: 30 in. Weight: 6.38 lbs. with 30-round magazine. Caliber: 5.56 mm. Maximum effec- tive range: 300 meters. Cyclic rate of fire: 650-900 rounds per minute.
context_page_description: The Colt Automatic Rifle-15 or CAR-15 was a family of M16 rifle based firearms marketed by Colt in the 1960s and early 1970s. However, the term "CAR-15" is most commonly associated with the Colt Commando; these select-fire carbines have ultrashort 10.5-inch and 11.5-inch barrels with over-sized flash suppressors.
  The CAR-15 name was an attempt to re-associate the AR-15 name with Colt, since the AR initially stood for ArmaLite Rifle, the original manufacturer of the ArmaLite AR-15. Colt later abandoned the CAR-15 concept, but continued to make carbine variations, using the "M16" brand for select-fire models and the "Colt AR-15" brand for semi-automatic models. However, in present usage, "CAR-15" is the generic name for all carbine-length variants made before the M4 carbine.
context_section_description: The GUU-5/P was a result of United States Air Force making ad-hoc upgrades to its GAU-5 series. The barrels and flash suppressor were replaced with the longer 14.5-inch (370 mm) barrel with a 1-in-12 twist, but the weapons retained their original designations. With the change to M855 cartridges, they either received 1-in-7 twist barrel or complete upper receiver assembly replacements. The GAU-5s markings were also removed and the weapons were re-stamped GUU-5/P.
caption: United States Air Force GUU-5/P Carbine
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