Creating true Semi-automatic and Burst-fire weapons

[Magnum Express]

I have been trying to create weapons that are semi-auto (the fire button must be pressed for each shot) or burst-fire (only shoot three or so rounds, and the fire button must be pressed again for another burst). I have run into a few problems:
- Weapons will continue to fire when I hold the fire button down.
- Weapons have no bullet spread, but instead each shot lands exactly where I'm aiming at.

For burst-fire, I tried the following on a custom M16:

Fire:
M16G A 0 A_ZoomFactor(0.99)
M16F A 1 bright A_FireBullets (3.6, 3.6, 1, 4, "BulletPuff")
M16G A 0 A_ZoomFactor(1.0)
M16F B 1 bright A_FireBullets (3.6, 3.6, 1, 4, "BulletPuff")
M16G A 0 A_ZoomFactor(0.99)
M16F A 1 bright A_FireBullets (3.6, 3.6, 1, 4, "BulletPuff")
M16G A 0 A_ZoomFactor(1.0)

I know the problem is in the last frame of the animation, but I just don't know what to do. Please help if you can.

[bgraybr]

Use Weapon.NOAUTOFIRE

...and as for the bullet spread, IIRC the first bullet fired in the fire state normally ignores the spread and is always perfectly accurate. Setting numbullets to a negative value removes this effect.

[Magnum Express]

Thanks