Colt Mfg Upper Receiver Conversion Kit .223 REM/5.56 NATO 16.1" B
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The Colt Conversion Kit contains the complete upper receiver group, including a charging handle, bolt carrier group, and back up sight. Conversion Kits are available in both the standard upper receiver with handguard configuration and Monolithic 1-piece upper receiver with free-floating barrel configuration. All barrels feature a 1/7 right hand twist. Now you can convert any Colt rifle to the most state of the art configurations.
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