Others should know a detailed guide of the weapons damage factor for all ships work in Combat mode, so here it is:

AG Systems Speed:
Firepower stat: C (60)

(against itself):
Missile- 18%
Rockets- 12%
Cannon- 27% (full clip)
Plasma- 48%
Quake- 18%
Mines- 6% (18% for all three mines)

(against Auricom Fighter):
Missile- 16%
Rockets- 10%
Cannon- 23% (full clip)
Plasma- 41%
Quake- 16%
Mines- 5% (15% for all three mines)

AG Systems Fighter:
Firepower stat: B- (70)

(against AG Systems Speed):
Missile- 19%
Rockets- 12.66% (38% for all three rockets)
Cannon- 28% (full clip)
Plasma- 51%
Quake- 19%
Bomb- 22%

(against Auricom Fighter)
Missile- 16%
Rockets- 10.66% (32% for all three rockets)
Cannon- 24% (full clip)
Plasma- 44%
Quake- 16%
Bomb- 19%

AG Systems Agility:
Firepower stat: C (60)

(against AG Systems Speed):
Missile- 18%
Rockets- 12% (24% for all two rockets)
Cannon- 27% (full clip)
Plasma- 48%
Quake- 18%
Mines- 6% (24% for all four mines)

(against Auricom Fighter):
Missile- 16%
Rockets- 10% (20% for all two rockets)
Cannon- 23% (full clip)
Plasma- 41%
Quake- 16%
Mines- 5% (20% for all four mines)

AG Systems Prototype:
Firepower stat: C (60)

(against AG Systems Speed):
Missile- 18%
Rockets- 12% per rocket (24% for all two rockets)
Cannon- 26% (full clip)
Plasma- 48%
Quake- 18%
Mines- 6% (24% for all four mines)

(against Auricom Fighter):
Missile- 16%
Rockets- 10% (20% for all two rockets)
Cannon- 23% (full clip)
Plasma- 41%
Quake- 16%
Mines- 5% (20% for all four mines)

F.E.I.S.A.R. Speed:
Firepower stat: C (60)

(against AG Systems Speed):
Missile- 18%
Rockets- 12%
Cannon- 27% (full clip)
Plasma- 48%
Mines- 6% (18% for all three mines)
Firepower stat: C (60)

(against Auricom Fighter):
Missile- 16%
Rockets- 10%
Cannon- 23% (full clip)
Plasma- 41%
Mines- 5% (15% for all three mines)

F.E.I.S.A.R. Fighter:
Firepower stat: B (80)

(against AG Systems Speed):
Missile- 20%
Rockets- 13.66% (41% for all three rockets)
Cannon- 30%
Plasma- 54%
Quake- 20%
Bomb- 24%

(against Auricom Fighter)
Missile- 17%
Rockets- 11.33% (34% for all three rockets)
Cannon- 26% (full clip)
Plasma- 46%
Quake- 17%
Bomb- 21%

F.E.I.S.A.R. Agility:
Firepower stat: B- (70)

(against AG Systems Speed):
Missile- 19%
Rockets- 12.66% (25.32% for all two rockets)
Cannon- 28% (full clip)
Plasma- 51%
Quake- 19%
Mines- 6.25% (25% for all four mines)

(against Auricom Fighter)
Missile- 16%
Rockets- 10.66% (21% for all two rockets)
Cannon- 24% (full clip)
Plasma- 44%
Quake- 16%
Mines- 5.25% (21% for all four mines)

F.E.I.S.A.R. Prototype:
Firepower stat: C (60)

(against AG Systems Speed):
Missile- 18%
Rockets- 12%
Cannon- 27% (full clip)
Plasma- 48%
Mines- 6% (18% for all three mines)

(against Auricom Fighter):
Missile- 16%
Rockets- 10%
Cannon- 23% (full clip)
Plasma- 41%
Mines- 5% (15% for all three mines)

Qirex Speed:
Firepower stat: B (80)

(against AG Systems Speed):
Missile- 20%
Rockets- 13.66%
Cannon- 30% (full clip)
Plasma- 54%
Mines- 6.66% (20% for all three mines)

(against Auricom Fighter)
Missile- 17%
Rockets- 11.33%
Cannon- 26% (full clip)
Plasma- 46%
Mines- 5.66% (17% for all three mines)

Qirex Fighter:
Firepower stat: A (100)

(against AG Systems Speed):
Missile- 22%
Rockets- 15% (45% for all three rockets)
Cannon- 34% (full clip)
Plasma- 60%
Quake- 22%
Bomb- 26%

(against Auricom Fighter):
Missile- 19%
Rockets- 13% (39% for all three rockets)
Cannon- 29% (full clip)
Plasma- 51%
Quake- 19%
Bomb- 23%

Qirex Agility:
Firepower stat: A- (90)

(against AG Systems Speed):
Missile- 21%
Rockets- 14.33 (28.66% for all two rockets)
Cannon- 32%
Plasma- 57%
Quake- 21%
Mines- 7% (28% for all four mines)

(against Auricom Fighter):
Missile- 18%
Rockets- 12% (24% for all two rockets)
Cannon- 27% (full clip)
Plasma- 49%
Quake- 18%
Mines- 6% (24% for all four mines)

Auricom Speed:
Firepower: B- (70)

(against AG Systems Speed):
Missile- 19%
Rockets- 12.66%
Cannon- 28%
Plasma- 51%
Mines- 6.25% (18.75 for all three mines)

(against Auricom Fighter):
Missile- 16%
Rockets- 10.66%
Cannon- 24% (full clip)
Plasma- 44%
Mines- 5.25% (15.75% for all three mines)

Auricom Fighter:
Firepower: A- (90)

(against AG Systems Speed):
Missile- 21%
Rockets- 14.33% (43% for all three rockets)
Cannon- 32% (full clip)
Plasma- 57%
Quake- 21%

(against itself):
Missile- 18%
Rockets- 12% (36% for all three rockets)
Cannon- 27% (full clip)
Plasma- 49%
Quake- 18%
Bomb- 21%

Auricom Agility:
Firepower: B (80)

Missile- 20%
Rockets- 13.66% (27.32% for all two rockets)
Cannon- 30%
Plasma- 54%
Quake- 20%
Mines- 6.75% (27% for all four mines)

(against Auricom Fighter)
Missile- 17%
Rockets- 11.33%
Cannon- 26% (full clip)
Quake- 17%
Plasma- 46%
Mines- 5.66% (23% for all four mines)

Auricom Prototype:
Firepower stat: A- (90)

(against AG Systems Speed):
Missile- 21%
Rockets- 14.33% (43% for all three rockets)
Cannon- 32% (full clip)
Plasma- 57%
Quake- 21%

(against Auricom Fighter)
Missile- 18%
Rockets- 12% (36% for all three rockets)
Cannon- 27% (full clip)
Plasma- 49%
Quake- 18%

Pir-hana Speed:
Firepower: B- (70)

(against AG Systems Speed):
Missile- 19%
Rockets- 12.66%
Cannon- 28%
Plasma- 51%
Mines- 6.25% (18.75 for all three mines)

(against Auricom Fighter):
Missile- 16%
Rockets- 10.66%
Cannon- 24% (full clip)
Plasma- 44%
Mines- 5.25% (15.75% for all three mines)

Pir-hana Fighter:
Firepower stat: A- (90)

(against AG Systems Speed):
Missile- 21%
Rockets- 14.33% (43% for all three rockets)
Cannon- 32% (full clip)
Plasma- 57%
Quake- 21%

(against Auricom Fighter)
Missile- 18%
Rockets- 12% (36% for all three rockets)
Cannon- 27% (full clip)
Plasma- 49%
Quake- 18%
Bomb- 21%

Pir-hana Agility:
Firepower: B (80)

(against AG Systems Speed):
Missile- 20%
Rockets- 13.66% (27.32% for all two rockets)
Cannon- 30%
Plasma- 54%
Quake- 20%
Mines- 6.75% (27% for all four mines)

(against Auricom Fighter)
Missile- 17%
Rockets- 11.33% (22.66% for all three rockets)
Cannon- 26% (full clip)
Plasma- 46%
Quake- 17%
Mines- 5.66% (23% for all four mines)

Pir-hana Prototype:
Firepower: B- (70)

(against AG Systems Speed):
Missile- 19%
Rockets- 12.66%
Cannon- 28%
Plasma- 51%
Mines- 6.25% (18.75 for all three mines)

(against Auricom Fighter):
Missile- 16%
Rockets- 10.66%
Cannon- 24% (full clip)
Plasma- 44%
Mines- 5.25% (15.75% for all three mines)