This semi-automatic colt carbine is the standard by which all modern sporting rifles and law enforcement carbines are judged.It features a fixed a2 front sight and magpul mbus rear sight a barrel with grenade launcher cutout dual heatshield handguards flat top upper receiver and buttstock which define this modern classic.Colt designs some of the most reliable AR-15's for LE and military personnel they have taken their basic CR model 6920 and improved it by adding Magpul MOE SlimLine furniture.Magpul Original Equipment (MOE) is a line of firearm accessories designed to provide a high quality economical alternative to standard weapon parts. Features:Action: Semi-AutoCaliber: 5.56x45mm NATOBarrel Length: 16.10"Capacity: 30+1Trigger: Single-StageSafety: ManualOal: 32"-35.50"Receiver Material: 7075-T6 AluminumSights: A2 Front Magpul MBUS RearBarrel Description: 4150 Chrome Moly VanadiumTwist: 1:7"Barrel Length Range: 16" to 16.99"Hand: RightStock Finish Group: BlackMetal Finish Group: Blued/BlackDOWNLOAD THE COLT MAGPUL AR15 RIFLE OWNER'S MANUAL