Calibre decisions last half a century, which is why the current wave matters so much. The US Army's 6.8mm Next Generation Squad Weapon programme, the UK's Project GRAYBURN and multi-calibre sniper tenders, European .338 and 7.62mm framework buys, and a new generation of anti-drone cartridges are all reshaping what infantry ammunition means. This hub holds ISC's small-arms reporting end to end: weapon and cartridge programmes, national tenders, case-material technology, production contracts, and the NATO standardisation arguments underneath them. Open source throughout, with every claim tied to a named document or announcement.