Pros:

A lot more aggressive compared to the stock SPAS
Reload animations are smooth and a lot more dynamic

Cons:

I've never seen shotshells that look like the ones in the sidesaddle

Conclusion:

PRETTY GOOD MOD. HAHAHAHAHA lol WEEEEINERZ

Pros:

Love this mod :3
Animations are awesome
Texture is perfection
Sound... I could make love to that noise

Cons:

NOPE

Conclusion:

DIS GUN GO POP POP POP IZ GEWD

Pros:

Favorite weapon mod as of yet
AWESOME sounds <3 
Textures are super nice
Love how clean it looks

Cons:

NONE

Conclusion:

Not sure what to say here... It's a very well made mod (typical Arby26). Especially digging the SOPMOD look with the Matech rear sight.

Pros:

Sounds awesome
Anims are well done (Really digging the reload)
Variated shell ejection is always nice
Texture is very nice

Cons:

NAWP

Conclusion:

Breaks away from the monotony of the M16 and adds that extra tacticool sparkle

Pros:

Reload anim- despite being too long- is awesome
Sounds awesome
Looks awesome
Worked flawlessly for me

Cons:

The reload anim is a bit long

Conclusion:

Great mod for those that are bored with the stock G3

Pros:

Makes you feel like a SPECIAL FORCES ZOMBIE KILLA
Pew sounds are awesome
Anims are smooth
Models themselves are extremely nice

Cons:

None

Conclusion:

Great mod for those that want that extra tacticool when slaying zedz

Pros:

Realistic animation
Fixes the "bolt handle coming back too far" issue from the original anim

Cons:

None

Conclusion:

Great animation that's sure to pick up the ladies 

Pros:

Extremely nice model
Animations are flawless
Kill zombies as Dirty Harry :D

Cons:

None

Conclusion:

A great mod for those of us that want to feel like the ultimate bad-ass!

Pros:

Animations are smooth
Textures are well done
Weapons have proper trademarks

Cons:

None

Conclusion:

If you're tired of the Glock and Sig combo, this is a great replacement!