Thanks for all the info. The reason I ask is I came across one in very nice condition with some nice glass and accessories for what you guys tell me is a very good price. So I'm off to buy it.
Just make sure the inside of the barrel weren't hit when they drilled the gas port.
My experience with a 14### T97 was quite awful at first, FTF every 3 or 4 rounds on a GI mag, but after filing the feed ramp (follow the instruction on YouTube), it's working great now!
I read someone were filing the ramp bcuz of rtf, care to comment?