convert 3tnk to have 1 weapon but a burst of 2

OpenRA.Game/GameRules/WeaponInfo.cs

@@ -83,6 +83,7 @@ namespace OpenRA.GameRules
 		public readonly bool Charges = false;
 		public readonly bool Underwater = false;
 		public readonly string[] ValidTargets = { "Ground" };
+		public readonly int BurstDelay = 5;
 
 		public IProjectileInfo Projectile;
 		public List<WarheadInfo> Warheads = new List<WarheadInfo>();

OpenRA.Game/Traits/Attack/AttackBase.cs

@@ -120,7 +120,6 @@ namespace OpenRA.Traits
 			if (info.PrimaryWeapon != null && CheckFire(self, unit, info.PrimaryWeapon, ref primaryFireDelay,
 				info.PrimaryOffset, ref primaryBurst, info.PrimaryLocalOffset))
 			{
-				secondaryFireDelay = Math.Max(4, secondaryFireDelay);
 				primaryRecoil = 1;
 				return;
 			}
@@ -159,7 +158,7 @@ namespace OpenRA.Traits
 				offset.ElementAtOrDefault(3) };
 
 			if (--burst > 0)
-				fireDelay = 5;
+				fireDelay = weapon.BurstDelay;
 			else
 			{
 				fireDelay = weapon.ROF;

mods/ra/vehicles.yaml

@@ -175,7 +175,6 @@ V2RL:
 		ROT: 5
 	AttackTurreted:
 		PrimaryWeapon: 105mm
-		SecondaryWeapon: 105mm
 		Recoil: 3
 	RenderUnitTurreted:
 	AutoTarget:

mods/ra/weapons.yaml

@@ -245,6 +245,8 @@ Grenade:
 	ROF: 70
 	Range: 4.75
 	Report: CANNON1
+	Burst: 2
+	BurstDelay: 4
 	Bullet:
 		Speed: 40
 		Image: 120MM