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ArmaLite Early ArmaLite AR-15 ultra-lightweight 'Hollywood' turned-down profile barrel, 1:14 twist only; A1: Also referred to as the "lightweight" or "pencil" profile. Government-specified barrel profile increased to between 0.675 and 0.575 inches; A2: Also referred to as the "government" or "gov't" profile. Barrel profile for which the portion ...
The Close Quarter Battle Receiver (CQBR) [5] is a replacement upper receiver for the M4A1 carbine developed by the US Navy.. The CQBR features a 10.3 in (262 mm) length barrel (similar to the Colt Commando short-barreled M16 variants of the past) which makes the weapon significantly more compact, thus making it easier to use in, and around, vehicles and in tight, confined spaces.
There were three versions of the Trophy 4: An economy version with a relatively low 8.6:1 compression ratio and a single-barrel carburetor; a hotter version with a 10.25:1 compression ratio and a single-barrel carburetor; and the most powerful Trophy 4 engine, which had a 10.25:1 compression ratio and a four-barrel carburetor.
Chicago [a] is the most populous city in the U.S. state of Illinois and in the Midwestern United States.With a population of 2,746,388, as of the 2020 census, [9] it is the third-most populous city in the United States after New York City and Los Angeles.