The right side mag release on the g3 is going to take a lot of work.  The arm hits in the new cutout for the g3 release.  It shouldn’t be hard to clearance that.   The problem is the Glock style latch itself.  The g3 changed the latch. Aside from the spring notch in the wrong spot that someone mentioned, the whole arm should be remade. I should be able to make one that will work with the modified arm. 🤞🏽

As for the safety levers. The aluminum levers work just fine.  The round barrel part of the lever is a little smaller but being aluminum, it wouldn’t matter.  

Now to the flat face trigger.  It’s very close but not a drop in.  The first difference is the seer pin is a threaded pin. This is kinda nice as the vector pin is punched in and extremely hard.  The threaded pin of the new trigger is slightly larger than the OEM. This means the slot in the frt needs to be opened up a little.  A few passes with a file or a dremmel will do just fine. We are only talking about .002” maybe.  The pin goes in, it just makes the trigger tight vs free moving.  The bigger issue is the pivot pin.  The pin for the OEM is 4mm (measured 3.95mm). The hole in the new trigger measures about 4.3mm. This is way too big and won’t work.  The easy fix for me was to make a 6mm OD 4mm ID sleeves.  A few min on the lathe and I made the sleeve from a 6mm stainless pin I have laying around.  I stepped up the hole in the new trigger until i got to the 6mm but.  It drills a hole to 5.98 mm so a perfect tight fit for the sleeve. This tool care of any slop in the trigger pin. 

Last is the face at the back of the trigger that contacts the safety.  The new trigger has extra material there.  A simple round sander took enough material off.  You just want to take off enough so there is about .010” space between the trigger and the safety in the safe position.  The trigger feels really good now.   Weight went up from 2 lb 14 oz to 3 lb 9 oz. It’s probably due to the shape and the leverage.  It can also be the new sleeve is a little tighter then the OEM trigger.  My sleeve id measured 3.98 and the In is 3.95mm. The OEM hole measure 4mm.  I guess a 4mm reamer would fix this but it’s fine.  Weight is in semi position.  

So anyone looking for a bit different of a trigger and want to put the work in, it’s possible.   

Little update with the airsoft parts.