It's been a while since we've had a ship of the week, so here we have three in one - the light bombers of the Rebel Alliance and New Republic, from the earliest days of the Rebellion through to the brief period of the restored Pax Republic
Y-Wing. The original. Two each of lasers, ion cannon and proton torpedo launchers. Not much by the standards of later ships, but they were tough, reliable, and held the line when they were all the alliance had.
B-Wing. The heavy punch of the later Rebellion and early NR. It also saw the introduction of modular weapons mounts - the two proton torpedo launchers were ubiquitous, but you could chose twin autoblaster, three ion cannon and a laser or three each of ion cannon and lasers. I'd go for the later option myself - more punch. Tricky to fly, and they could rip themselves apart if the cockpit gyro failed, but they packed a wallop.
K-Wing. The bomb truck of the New Class programme and the Fifth Fleet. Not much in the way of permanent armament, but its hardpoints make it the ultimate mission-configurable platform. It's a pity we don't see much of these guys, because they finally show the New Republic maturing from a guerilla army into a professional fighting force, sacrificing hyperdrive and flexibility for raw punch and mastery of a single role - delivering as much ordnance as could be hung on their frames.