Here's the weapon entry.
$Name: Heavy Ion Cannon
$Model File: none
@Laser Bitmap: laserglow03
@Laser Glow: 2_laserglow03
@Laser Color: 10, 50, 255
@Laser Color2: 20, 20, 255
@Laser Length: 80.0
@Laser Head Radius: 15.00
@Laser Tail Radius: 15.00
$Mass: 10
$Velocity: 750.0
$Fire Wait: 5.0
$Damage: 12500
$Blast Force: 500.0
$Inner Radius: 80.0
$Outer Radius: 200.0
$Shockwave Speed: 100
$Armor Factor: 1.0
$Shield Factor: 0.8
$Subsystem Factor: 0.8
$Lifetime: 15.0
$Energy Consumed: 0.30
$Cargo Size: 0.0
$Homing: NO
$LaunchSnd: 205
$ImpactSnd: 85
$Flags: ("Big Ship" "Huge" "supercap" "particle spew" )
$Icon: icongun03
$Anim: LoadGun02
$Impact Explosion: ExpMissileHit1
$Impact Explosion Radius: 100.0
$Muzzleflash: huge_muzzle
$Pspew:
+Count: 2
+Time: 20
+Vel: 0.20
+Radius: 10.0
+Life: 6.0
+Scale: 0.1
+Bitmap: Kayser_Particle