Although the scope makes it easier to engage enemies at long ranges, the player should check frequently for nearby enemies attempting to flank the player.One headshot is enough to kill regardless if the target is armored or not. Be sure to take advantage of the scope and aim for the head of targets.Movement speed in hammer units per second Despite having a Terrorist's version of scoped assault rifle template, they prefer to use the AUG if they find it. The SG 553 is the 2nd main weapon for Terrorist bots who have weapon preferences of wielding scoped assault rifle. However, it is the slowest firing assault rifle of all. The SG 553 has the slowest movement speed out of all assault rifles. It is slightly more expensive than the AK-47, making it the most expensive assault rifle on the Terrorist side. The SG 553 is one of the few guns capable of scoring fatal headshots regardless of armor. The SG 553 has slightly less base damage than the AK-47, but is the only weapon with 100% armor penetration, while the AK-47 has 77.5% armor penetration, meaning that it deals more damage to armored enemies than the AK-47, and is also the highest of any assault rifle. Spraying for an extended burst whilst using the scope causes the scope dot to gradually disappear. The scope now also provides a HUD overlay of the scope, including an aiming reticle, giving the impression of the player actually aiming down the scope. Unlike the Krieg 552, there is no longer a fire rate penalty for using the scope. While scoped in, the player's view is zoomed in by 3x, recoil is significantly lowered, accuracy is increased, and the player's movement speed is reduced considerably. The player will leave the scope if they use secondary fire again or switch weapons. The player can enter the scope by using secondary fire.

Like the Krieg 552, the SG 553 is equipped with a telescopic sight. In-game, the SG 553 serves as the successor of the Krieg 552 from previous titles.

Although the in-game weapon is named SG 553, it is modeled after the SIG556 HOLO, a semi-automatic rifle of the SG 556 series based on the same platform intended for the civilian market, with an aluminum lower receiver that accepts STANAG magazines. It is an improved version of the SG 552 assault rifle, with the main difference being an added charging handle. The SG 553 is a Swiss-made assault rifle manufactured by Swiss Arms as part of the SG 550 platform introduced in 1990.

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