SG556

The SG556 is a improved NX variant of the SG 550 Assault Rifle that exclusive to the Black Market.

Its major change is its firepower. It is significantly higher than the original version, which is slightly higher than the M4A1's low-average damage rating. The recoil of this weapon is also lower (but not a large portion of it). The recoil in the shop stats say it has less recoil than the M416 CQB, but after some testing, it is found that although it does have less less recoil, it will start shaking side to side near the end of the clip. It also has a small magazine capacity of only 20 rounds. A extended clip will help in increasing the amount of ammo though this will also reduce its already slow reload speed.

Retaining most of the 550's statistics, it is along one of the "Spray Snipers" that is easily controllable with automatic fire, strangely NX users are not making use of this, due to the fact it is still weaker than the basic M4A1 and lacks a Red Dot sight for no spread, as most prefer the common M416 CQB

Trivia

 * This weapon is actually a US civilian variant of the SG550 which was designed to also accept STANAG magazines from the AR-15 series and pretty much every NATO assault rifle since.
 * This weapon, along with the L96A1, are Counter-Strike exclusive weapons in Left 4 Dead 2.