Can the Pioneer build anti-air structures that have weapons such as missiles to defend our bases?

The Pioneer performs fully contained modular outpost construction on-site. It creates modular structures, foundation, things like that. As Silas Koerner points out, this is pretty revolutionary as far as ship capabilities go. The Pioneer isn't a weapons manufacturing plant, repair shop, or furniture store, however - External improvements like static defenses are among the concepts we are developing for outpost add-ons. Any external add-on structures will be bought at a store rather like ship or personal equipment and then can be placed when you put down the outpost or added on later.