Roll Out the Thunder!

Join the Rolling Thunder event and claim the mighty SDP wz 66 Grom—a Tier VIII Premium Polish tank destroyer boasting a deep⁠-⁠rifled gun that is devastating at close range.
Start: October 03 at 07:30 UTC+8 / End: October 14 at 08:00 UTC+8

Get the Grom With a Raucous Discount!

The Rolling Thunder event runs for 11 full days and consists of 10 Stages. Each Stage can be conquered either by mastery or by commitment: just complete the corresponding mission! Each Stage adds 10% to your discount on the Grom package in the Premium Shop so you can get it without spending money!

Missions for Commitment

These missions may take longer, but they are generally easier to complete. Remember: These missions must be completed in Tier VI–X vehicles, and mission results will only count if you finish in the top 10 on your team by XP earned at the end of the battle, regardless of whether your team wins or loses.

Missions for Mastery

These missions are trickier and more complex, but will save you time if you have the skills for them. These missions must be completed in Tier IX–X vehicles.

 

By the Name of Thunder

Grom is Polish for "thunder", and this chariot of war fully deserves the name. Its damage at distances of 50 m or closer is a deafening 800 HP. It benefits from close combat even more than its relatives from the Polish Tech Tree! The SDP wz 66 Grom also possesses decent mobility and sloped frontal armor, making it perfect for hit-and-run tactics.
 
 
VIII
 
SDP wz 66 Grom
Average Damage per Shot (< 50 m)
800/800/800 HP
Average Damage per Shot (500 m)
200/200/800 HP
Average Penetration
272/296/80 mm
Gun Reload Time
16 s
Gun Depression/Elevation Angles
−7/15 deg
Aiming Time
2.7 s
Dispersion at 100 m
0.4

Wield the Thunder Now!

Running out of time to complete the Rolling Thunder event? Or want to get your SDP wz 66 Grom lightning fast? Go to the Premium Shop and purchase the Grom bundle. Remember, every Stage you complete increases the discount you receive!
Time to Thunderstrike!
Zap your enemies, complete Stages, charge up your discount, and roll out into battle riding the thunder!
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