Explosive Rifle Mastery

Explosive Rifle Mastery
The Explosive Rifle Mastery is a challenge which has five parts to complete and can be found in the Journal section of the pause menu in single player mode. The Explosive Rifle is available after installing the Liars and Cheats DLC. 1.Purchase the weapon from the Gunsmith in Blackwater.
 * The first part is obtaining the weapon
 * The second part is killing 5 enemies hidden in cover.
 * The third part is killing 3 enemies with one shot.
 * The fourth part is killing 2 wild animals with one shot.
 * The fifth part is killing 1 enemy having earned the army uniform.

2.Wait until they duck behind a crate or building then surprise them with an explosive round.

3.Take your chances in an open fight or hogtie enemies and group them for a surefire hit.

4.A couple of canoodling skunks blown to smithereens. Whats not to like?

5.Wearing an army uniform and obliterating someone with explosive rounds has to be the motto of somewhere.

The achievement Master Exploder is gained upon completion of these tasks.