M&p15 complete upper assembly includes a flattop receiver, 16" m4 profile chrome lined barrel in 5.56mm with a2 birdcage compensator and m4 style post front sight.It also has a complete bolt carrier group with chrome lined carrier, staked, chrome lined gas key and charging handle.
Receiver Finish: Black Type: Complete Gas Impingement Caliber: 223 Rem Sights: A2 Front Barrel Length: 16" Barrel Material: Steel Twist: 1:9" Barrel Description: M4 Profile Barrel Finish: Black Receiver Description: A3 Handguards: Carbine Length Handguard Finish: Black Barrel Length Range: 16" to 16.99"
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