"Let's hope they acquit themselves well on the tabletop."
Taken as Command Dice 6, Regular they should do quite well. They are Aggressive as well giving them a good deal of go forward. Note the Aggressive rules is different in CoC-Espana as we felt Aggressive troops are best represented with an ability to lift of shock more effectively than non-agro types.
The Tear Gas is very useful if you can get them close enough and get a run of command dice to take full advantage..ie pop smoke and then in the next phase move into assault if you've been able to load your target up with shock. it is unique to the Guardia de Asalto, Guardia Civil & Carabineros list and is one of the 'cute' things they have above all others.
With Aggressive troops and command dice 6 I'd keep them mobile and would be a little less reluctant to take more static levels of support. A Hispano-Suiza MC36 (MG) would make for a hard hitting and somewhat mobile force and look damn sweet using the Minairons model.
...please post pics if you get these troops on table!
The Assaltos are one of my favourite force in the SCW and look damn good on-table...
Cheers
Happy W