I have a Colt AR15 20" upper with charging handle no BCG, the barrel is marked with a C & MP, the receiver is marked with a C. It appears to be off a SP model lower, no left hand deflector. Condition, no noticeable wear, finish is great, rnd count unknown appears to be low. $650 OBO FTF in Rockville, No trades. If interested send PM. Thanks
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