I want to trade a new factory GLOCK 21 13rnd mag for mag(s) for: a factory GLOCK 17/19, RUGER SR9 17rnd factory mag, AK74, SAIGA 5.45X39 or .223 or maybe a GLOCK 40 S&W/357 SIG, AK47. In Austin, prefer a ftf but will consider mailing.