I am also in the same boat. I bought the GSG9 barrel before doing any reasearch and assumed that all 45 tri lugs were standard. Boy was I wrong.
I’ll be running the GSG9 mount on a octane 45 as well.
I asked Tommy to cut and thread a shortened USC barrel to the standard US thread pitch for .45ACP in .578x28 so I could use SilencerCo’s 3-lug adapter. It fits my current Octane 45 can, and will also work on an Omega 45K that’s sitting in NFA jail waiting for a good home.
The SiCo 3-lug locks up tight on the Octane and if I can get some decent weather, I’ll take it out and see how much POI shift there is and report back.
Here’s the view from a few happy snaps:
Overall look as well:
Also other vendors on the web.
Manufacturer here: https://www.ergogrips.net/shop/ergo-...ing-hook-base/
Last edited by UltraFudd; 12-24-2018 at 08:37 AM.
Thanks for sharing that!