Quote Originally Posted by MadAngler1 View Post
I agree with your assessment of their extended SEF lever. It looks exactly the same as the one my Zenith has.

I went ahead and ordered a FBI lower, a completely US made ambi trigger pack and the ambi ESSL level system. I went over all the parts with the HK Parts people, and they claim it should be compatible. If it doesn’t run, I can send it back. I’ll check it out and try it this weekend.

I feel like a total HK dork/nerd buying all these parts and playing with them
I have the US made ambi pack from HKParts. Seems like $400 is a high price to pay for the ability to select Fire/Safe on presentation, but it is what it is. The pack works on both my Zeniths and I don't see why it wouldn't work for you. The stock SEF trigger was better with respect to smoothness and feel.

The HKParts US flat trigger helps and is relatively cheap. Its a little more involved than an AR trigger swap but have a few beers and it will all fall together!