It's still a gamble. Not every new Glock has BTF issues, only some in a random order. That's why serial numbers don't tell you anything about BTF issues. Every new gen4 in 9mm and .40 test fired after ~February 2012 has the newest recoil spring and ejector. You need to go by the test firing date (small orange envelope in Glock case with two shell casings in it) if you want a recently made one.
Last edited by Made in Austria; 06-04-2013 at 16:07..