This is 5th Column's Recon Detachment. The detachments are as follows.

Detachment Alpha (5CRA) will be composed of everyone who qualifies as a marksman.

Detachment Bravo (5CRB) will be composed of everyone who qualifies as a sharpshooter

Detachment Charlie (5CRC) will be composed of everyone who qualifies as expert

Detachment Delta (5CRD) will be composed of hand picked snipers that are the best of the best.