Okay, I have this multi-offset beam weapon that can't hit missiles. Specifically, it seems to aim just to the side of them by a few pixels. Either way, it does roughly 400 fragmentation damage in one burst, which as far as I know, is enough to one-shot any missile, and even so, it often wastes several shots on one missile without doing anything to it. Doesn't matter what kind of missile. Sometimes it seems to be able to destroy them, usually when there is little transversal velocity involved. It hits fighters just fine.
"id":"brburst", # this id must match what's in the spreadsheet
"specClass":"beam",
"type":"ENERGY",
"size":"MEDIUM",
"displayArcRadius":600,
"turretSprite":"graphics/weapons/arguspd_turret_base.png",
"turretGlowSprite":"graphics/weapons/arguspd_turretglow.png",
"hardpointSprite":"graphics/weapons/burstpd_hardpoint_base.png",
"hardpointGlowSprite":"graphics/weapons/burstpd_hardpoint_glow.png",
"glowColor":[190,205,52,255],
"hardpointOffsets":[12, -9, 12, 9, 12, 0],
"turretOffsets":[8, -9, 8, 9, 8, 0],
"hardpointAngleOffsets":[0, 0, 0],
"turretAngleOffsets":[0, 0, 0],
"convergeOnPoint":true,
"fringeColor":[231,251,91,175],
"coreColor":[86,96,46,255],
"darkCore":false,
"width":6.0,
"textureType":SMOOTH,
#"textureType":["graphics/fx/emp_arcs.png","graphics/fx/emp_arcs.png"],
"textureScrollSpeed":292.0,
"pixelsPerTexel":5.0,
"fireSoundOne":"beam_light_burst_1",
"fireSoundTwo":"beam_light_loop",
I'm not sure if it's a rounding error or something, but it's pretty much identical to the Guardian PD except it only has three beam offsets in total.