The Gen2 has a pile of things you might want - an Ambi mag release, enlarged safety, M4 feed ramps. The Gen2 is compatible with the T97.ca lower.
If you get a gen 1 with serial number with 1400 ### or higher it won’t have any feeding / ramp issues, they were the last batch of gen 1s. I just upgraded mine witva leftcsidd charging handle, and left side mag release. Have had no issues with a low profile 3 moa Red Dorcas far as height on my carry handle rail. I wanted to keep mine as close to a qbz95 as possible
There is 15### gen 1.
And my 13### gen 1 has no feeding issues either.



























