I've been trying to decipher the P22 part numbers.
I have figured out the 5-digit numbers: 22003 is 3.4" black, 22005 is 5" black, and 22007 is 3.4" Military OD Green.
What I can't figure out is the 3-letter prefix (QAP, QAN, WAP, WAN). There's also a CAP, for which the "C" appears to be...