You have to send a request as 501st Sandtrooper, before you can request police officer.
http://forum.mepd.net/index.php?showtopic=12352&&page=46
Ps. Great Armor!
The move along trooper has handguards like this, why uwe need to change it and rechange it for swat again? When i made my police officer this guards they where exactly like this.