SCAR-773

The Terran-made SCAR-773 is a hypervelocity, magazine fed assault rifle primarily developed in the 2620s. 
It is the primary service rifle in use by the Terran Army, replacing the 400 year-old Sk-FSRM10 in 2632. Although originally designed for the Terran military, the sCAR was adopted as the primary rifle of Federal Police and several other countries. In less than a century of production, over 6 billion units have been produced. This means that for every second since it has been put into service, two SCAR-773s have been built. It is one of the most widespread weapons in civilian areas where the ownership of weapons is legal, notably the Territories and parts of the Mirdesh Confederacy.
Designed with the intent of being extremely modular, it received several major overhauls and improvements over the years for military usage. The newly introduced model K is currently replacing the previous model H. It also has variants which completely overhaul the weapon for a different use. The Sniper Rifle (SR) variant drastically increases range, accuracy and muzzle speed at the cost of ammo capacity, weight and manoeuvrability, whilst the Security and Control (SC) variant has an integrated heat gun for crowd dispersion. There are over 20 main military variants, each with their own subvariants for different camouflage and conditions, and another 200 specialised variants. 
Initially designed and manufactured by TMP, the production and design of variants of the weapon transitioned to Atlantis Corporation (specifically HK) when TMP closed down their last weapon section in 2644. 
=== Specifications ===
The SCAR was designed to be highly modular. As such, the specifications listed here are the ones of the model K. 
It is very light and compact, making it ideal for close quarters combat. It is also relatively cheap, compared to energy-based rifles which are the galactic standard. Whilst it lacks the explosive power of energy weapons, it more than makes up for it with its high ammo capacity and very high penetration ability. Like most Terran rifles, the sCAR is a hypervelocity weapon. The muzzle velocity of 2000m/s allows it to have very high penetration and overall firepower even with low calibre. It utilises the 3mm Federal Standard Ammunition Designation (FSAD) ammunition, used by nearly all non-pistol Terran guns.