Re: TBAC 338P-1 vs 338BA
I run a 30BA on several of my rifles and it attaches and detached pretty darn fast. It may not have a button to push, and little clicky noises when you turn it, but it has, for me, been 100% on return to POI after taking it on and off more times then I can imagine. It, with the four or so rifles I've ran it on, has the same shift on POI suppressed vs unsuppressed. I only own 1 BA van so I can't comment if this is common or not.
For me, knowing that it is the best design I've used regarding accuracy and durability being #1 I wouldn't trade the attachment system for any other companies "fast attach" design. Besides that their brake design is also very functional.
I'm not a ninja. I just like my gear to do the same thing everytime no matter how dirty it has been, fell over onto the ground, or covered in icy mud. The TBAC brake attach does that very good.