|“|| A standard issue NATO 5.56x45 caliber round specially designed for accurate automatic fire. Provides good ballistic characteristics, having been designed on the basis of a hunting round. Widely known under its SS109 index.|
- Call of Pripyat in-game description
5.56x45mm SS109 is a NATO semi-armor-piercing rifle ammunition featured in the S.T.A.L.K.E.R. series.
Shadow of Chernobyl
In Shadow of Chernobyl this type of ammo can be found and bought by the player, in similar ways to other ammo, after visiting the bar. While it is very rare in the Dark Valley it will sort of replace the old 5.45x39mm ammo in regions further north, making a change to a compatible weapon beneficial, but only after completing all missions in the area. It is not found or sold further south.
SS109 cartridges are mostly non-existent early in the game and only become more common after the player exits the Cordon, where it is sold by most traders. It can be easily salvaged from fallen Freedom members.
Call of Pripyat
Unlike previous games, SS109 cartriges are common found in all areas, but is slightly hard to actually obtain without resorting to killing every stalker holding a 5.56x45mm firearm.
Owl sells them by default, however, unless one has done enough quests around Zaton that he'll lower his prices, he will sell a single box of SS109s at around +2000RU, which is very expensive at the start of the game.
SS109 rounds have similar performance to 5.45x39mm FMJ lead rounds, but differ in that they have a hardened steel penetrator tip. The penetrator can pierce light cover or body armor and the composite alloy slug behind it will go on through. This gives them better penetration against heavier armor, giving the player a slight edge in the late game where heavily armored stalkers are a more frequent opponent.
It is also available in 5.56x45mm AP.
- On the ammo carton, the compatible weapons listed are: LR-300, LR-300SFR (LR-300 with PSO-1 scope and GP-25 Kostyor grenade launcher), G36, FN2000, MP5 (not in-game) and the SGI 552.
- The flavor text correctly describes the standard NATO service round as the SS109. However, the ammo carton has SS190 written on it and the game code calls it the ammo_5.56x45_ss190. The SS190 is the 5.7x28mm FN Ball round.
- The ammo carton has the notation "525 Grn. M.C. Solid Bullets" on the lower right corner.
- This line of text is found on the military-style ammo cartons.
- Grn indicates the weight of the bullet in grains. The NATO-standard SS109 cartridge's bullet weighs 62 grains [4.0 grams].
- M.C. indicates that the bullet is "metallic cased", a Remington Arms term for "Full Metal Jacketed" (FMJ). The SS109's bullet is covered in a copper sheath.
- Solid Bullets indicates that the cartridges are Ball (lead slug) ammunition and do not contain a Semi-Armor-Piercing steel penetrator or Armor-Piercing metal core. However, the SS109 has a two-part bullet with a steel core in front of a lead (M855), tungsten-composite (M855 Lead Free), or copper alloy (M855A1) slug.
- The ammo carton says in the lower right corner that it holds 60 rounds. Rifle cartridge cartons hold 20 rounds. US military rifle cartridges are usually packed in cardboard spacers that hold two or three 10-round stripper clips each, carried in the pockets of ammo bandoleers; 140 rounds in 20-round spacers in a 7-pocket M3 bandoleer or 120 rounds in 30-round spacers in a 4-pocket M8 bandoleer.