Question about pre/post-2011 A5's
I'm planning an A5 build from spare parts using either a 1st or 2nd gen receiver. Looking at post-2011 models I can see where the new-style grip frame differs from the OG and the HE frames, so I'm wondering if there might be any compatability issues between one of the new style mech/RT/Electronic frames and an old upper receiver. I'm not anticipating any problems since it doesn't seem like any other modifications are different. It seems like I'd just need to leave out the tombstone latch since the 2011 frame acts as the latch itself.