I recently purchased a Colt AR-15. Markings on the gun include: Colt; SPORTER COMPETITION HBAR CAL .223 SER CH 004### On the barrel; C MP 5.56 NATO 1/9 HBAR
I was told by the previous owner that it has had very few round fired through it, and this certainly looks to be true (no noticeable wear and no scratches). And it shoots like a dream. The first 5 rounds I shot through it were all within a 1.5 inch bullseye at 100 yds. I appreciate any help you can give.