It is weird that it happened at all, but not impossible. It just so happens that the detent ended up aligning its self with the small hole on the buffer when i was pulling it out.

Why would a buffer have a small hole that is just a tad bigger than the detent pin it's self? is it a drain hole? or is it there so that you can squirt some lube in there to keep the weights from rusting over time?

And if anyone can recommend a better buffer for my Rifle length Colt 6601C, I'd very much appreciate it.

I did have issues with FTE, FTF, and some short stroking when i first took the rifle to the range, but those issues no longer occur. They were due to poor magazines, faulty 15 year old ammo, and a serious lack of lube.

After getting a hold of good mags, good ammo, and then a good lube, the rifle has worked flawlessly in both hot and freezing weather. its not uncommon for me to fire 500 rounds per range trip, without suffering a single malfunction.

So, is there really a reason to change the buffer?