Model 16 & 116 AccuTrigger/BBR?

What options would I have to upgrade the triggers in these two rifles? As far as I can tell I am limited because both have bottom bolt release mechanisms that are worked into the trigger.

1) If I had the actions converted to side release, Would I then be able to upgrade the triggers?
2. Or is there another option while leaving the BBR in place.

Both rifles have been rebarreled and are sitting in MPA chassis.
Thanks, David

Have the receiver milled so you can a top bolt release / sear
then you can use the trigger of your choice

I bent a TBR sear to work as a TBR.

However, it was also reported to break doing so.

My next test is to heat up the BTR sear and paly with heat and bending.