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BCM Standard 16" M4 Carbine Upper Receiver - No Bolt Carrier Group, Charging Handle or Handguard.
Made by Bravo Company MFG, Inc. (BCM) These Barreled Upper Receiver Groups are designed for shooting professionals with the Mil-Spec features for the demands of their duty. They are fully assembled, head-spaced, and test fired. These do not include bolt carrier group, charging handle, or handguard.
Features:
Posted by Bryan on 31st Mar 2012
I bought this upper to put on my Aero Precision stripped lower that I have had for some time. I bought a BCM bolt carrier group to fit in the upper, and a Surplus Ammo improved lower parts kit. Everything fit together really well and there is no rattle or loose parts in the rifle at all.
I have about 200 rounds though it so far and was able to get 1 inch groups at an indoor range out to 30 yards with a Magpul BUS sight. I plan on going out to the desert to try it out at some greater distances.
I did not have a single malfunction in those 200 rounds I fired in one shooting session.
I would buy another one for a different build without a second thought.