6.8x43mm SPC

The 6.8 SPC cartridge was developed in early 2000s in attempt to counter emerging 5.56mm issues with lack of armor penetration and terminal performance, but also retain standart AR-15 plaform. Resulting cartridge turned to be even more powerful than 7.62x39mm at all ranges with slightly steeper trajectory than 5.56mm. Unfortunately, project never really took off and remains civilian niche round.

UAS Ammo types

 * SSA855 FMJ: Orignial military load by Silver State Armory, basically an enlarged M855.
 * SSA-C FMJ: Improved ball round with stronger terminal effects.
 * SSA-EF Tactical: Barrier-blind expanding and fragmenting ammo.
 * SSA AP: Tungsten-core AP load desogned for military.
 * SSA SLAP: Improved Tungsten-core AP load, later picked up by MAI.
 * GS Custom FMJ: 80-grain moly-coated copper bullet designed for high-velocity applications.
 * GS Custom HV FMJ: As above, but actually loaded to reach 3400 f/s from 16-inch barrel.
 * T6B Tactical: Elite Ammunition copper alloy bullet, designed to expand in living tissue.
 * TSX85 Tactical: Barnes 85-grain expanding fragmenting bullet.
 * 110SST Tactical: Hornady 110-grain expanding bullet.
 * EA77 FMJ: Light 77-grain FMJ load.
 * Fusion Match: 115-grain soft-point match-grade bullet.
 * Gold Dot FMJ: Speer bonded-core load.
 * S4 UltraRaptor GPR: Enlarged version of certain hot 5.7mm load.
 * SCC SUB: Special purpose subsonic load.
 * MDWG SUB: Expanding subsonic load.
 * Polymer Frangible: 110-grain frangible load.
 * RBCD Varmint: (In)famous "blended metal" wonder bullet. Now in 6.8!