After my last trip to the range, I was cleaning my COLT Match Target M4 (16.1" 1:7 twist barrel, 5.56mm, Post-Ban Brake, all factory except for the ARMS SIR, BUIS, Aimpoint) and when i got to the FCG i noticed some wear on the right side of the hammer. This was the first time in 3 trips that i had cleaned it, but i only shot around 100 rounds a trip. I've only put about a total of 1000 rds through the firearm since i've owned it. I purchased it NIB. I use 55gr Federal American Eagle FMJ BT ammunition. I have never had any other problems with weapon. Even now it still fires like it was brand new. I am just concerned with the wear on the hammer. The right side is rough and has ridges, i will try to get pictures of it this afternoon.
The only other wear i've seen on the hammer is the finish in the center which i would expect from normal use, the wear i am seeing actually looks like the metal is deformed. I don't see any other abnormal wear on the other lower components, the firing pin, or the bolt carrier. I pulled the bolt out and besides some carbon build up, I noticed that the there is some play in the gas rings. The slots in the rings are offset. Since I am not having any problems cycling, I would think that the gas system is A-OK.
I've used Hoppes 9, CLP, and Rem Action Cleaner to clean, and either CLP or Militec to lubricate.
I'd rather ask here before i sent the firearm back to Colt for some undisclosed period of time.
Here are the pictures, after further inspection, i realized that it appears the ridges came before the finish was applied to the hammer. maybe poor QC on colt's end? i guess i never took notice of it until i started building an AR and have seen so many pictures here. Compared to my girlfriend's armalite hammer (nice and smooth) it looks like someone chewed mine out of metal.
Larger pictures are available here (hammer_*_lg.jpg).
thanks dano, i might replace it anyway, just so it's nice and smooth.