Wolverine WVR-6R is a Medium-class 'Mech in Battletech.
As a fast strike 'Mech, Wolverine 6R is a reasonable choice. High ground speed is mated with satisfactory Jump Jets, allowing the Wolverine to rapidly flank enemy forces. The armament is decent, with an AC/5 for longer range attacks, and an SRM-6 and Medium Laser for closer-in attacks. The light heat output of the 6R means it can sustain fire for a long time.
Optimized Stock Loadout - The 6R is already quite flexible with the stock configuration. Relocating the ammunition to the legs will prevent stray critical hits from destroying the Right Arm and Left Torso with ammo explosions.
AC/20 Brawler - The 6R variant has a big head just enough tonnage to mount a single AC/20, 2 tons of ammunition, and full Jump Jets. From the stock configuration, just remove all weapons and ammunition, and cut Heat Sinks to free enough tonnage for the big gun. You can opt to cut some Jump Jets for additional armor
SRM Brawler - A popular build for the 6R is a brawler with 3 x SRM6 w/ 2 tons of ammunition + 1 Medium Laser. The remaining tonnage will be enough for full Jump Jets, and maximum front armor.
Long Range Sniper - Now with the Heavy Metal expansion I have been playing around with the LBX Autocannons. Give this Wolverine 2 LBX-2’s and an LRM-10 and it basically works as an LRM boat, delivering 96 points of damage in the LBX damage spread plus an additional 40 from the LRM. This mech can stay far enough away from the fight that there is no need to worry about armor.