COLT UPPER KIT 5.56 14.5. 56 14.5 - Specifications for COLT LE6921CK-NHG UPPER KIT 5.56 - No Hand Guard 14.5: Manufacturer: Colt Caliber: 5.56x45mm NATO .223 Remington Finish: Matte Color: Black Gun Model: AR-15 Condition: New Gun Make: AR Platform Magazine Included: No The COLT LE6921CK-NHG (No Hand Guard) UPPER KIT 5.56 14.5 is a quality addition to the Colt lineup. For more great deals on AR15 Upper Receivers by Colt please browse our Colt Gun Parts page. What firearm models does the manufacturer say COLT LE6921CK-NHG UPPER KIT 5.56 - No Hand Guard 14.5 is compatible with? The manufacturer says that COLT LE6921CK-NHG UPPER KIT 5.56 - No Hand Guard 14.5 is compatible with AR-15COLT LE6921CK-NHG: UPPER KIT (No Hand Guard) 5.56 14.5