Pros:

*Burst-fire M16A2, as it should be
*Real nice model detail
*Stock sounds fit the burst fire of the M16 well
*Wear detailing, duct tape repair(s) as a used M16A2 would have
*Reload animation is cool and fits well

Cons:

*Handguard foregrip wasn't necessary, but it's quite acceptable considering how flawless the rest of the skin is
-Foregrip could be attached directly to the handguard holes, so it's reasonable 

Conclusion:

If you want a burst-fire M16, this is your skin. No, really. No tacti-cool red-dots, fancy PEQ lazers, none of it. Just the A2 as issued. Would be nice if it could replace the game's M16 in L4D1 campaigns (would make more sense), but that's a personal issue. 10/10