Apologies in advance if this is posted in the wrong section. I bought a brand new Gen3 G20 last week. I put about 50rds of Sig ball rounds thru and it ran as well as my Gen4 G20's. Took it home to disassemble it. As I am taking the slide off the rsa falls out and the barrel almost does but I catch it. I have never had this happen and I own four Gen3 Glocks and 8 Gen4's. So I reassembled the Gen3 20 and disassembled it about 10 times. Half the time the rsa would fall out, the other half it would remain where it was supposed to be. Is this normal and just something I haven't experienced yet?