Medef and NATO calibres: 9x19mm, 5.56x45mm, 7.62x51mm
Quick answer: Three calibres in Medef Defence’s cartridge portfolio are part of the NATO standardisation system: 9x19mm, 5.56x45mm and 7.62x51mm. The 7.62x39mm and 9x18mm Makarov in the same portfolio represent former Eastern Bloc standards. This file summarises what a NATO calibre is, the difference between STANAG and the C.I.P. and SAAMI specifications, and where Medef’s products sit within that framework, using publicly available information.
What does NATO calibre mean?
NATO members secure interoperability in ammunition through standardisation agreements known as STANAGs. A calibre being a “NATO standard” means that its dimensions, pressure and performance requirements are defined in a common document so that it can be used safely and interchangeably in member states’ weapons. The 5.56x45mm is the typical example: the cartridge family developed by FN Herstal was standardised on October 28, 1980 through STANAG 4172, the reference bullet in the document is the SS109, and its US-manufactured counterpart carries the designation M855. The 7.62x51mm is NATO’s standard rifle and machine gun cartridge, while the 9x19mm is the alliance’s widespread pistol calibre.
On the civilian side the yardstick is different: specifications for cartridges and firearms are published by C.I.P. in the European market and by SAAMI in the United States. The NATO, C.I.P. and SAAMI logos on Medef’s site refer to these three frameworks; which document the company holds for which product is not officially disclosed.
The standards map of the Medef portfolio
| Calibre | Standard framework | Medef product |
|---|---|---|
| 9x19mm Parabellum/Luger | NATO pistol calibre; C.I.P./SAAMI civilian specification | FMJ; subsonic and hollow point in the catalogue |
| 5.56x45mm | NATO STANAG 4172 (SS109/M855) | Dectus family; FMJ and SS109/M855 in the catalogue |
| .223 Remington | SAAMI/C.I.P. civilian specification | FMJ in the catalogue |
| 7.62x51mm | NATO standard rifle cartridge | Vipera family, FMJ |
| 7.62x39mm | Standard of Eastern Bloc origin | Vipera family, FMJ |
| 9x18mm Makarov | Eastern Bloc standard pistol calibre | FMJ |
Turkey’s NATO membership ties this standards map directly to a commercial framework: interchangeable ammunition in alliance exercises and joint operations requires member-state producers to manufacture to STANAG references. For Turkish producers, proven production in NATO calibres is a precondition both in domestic purchases and in exports to allied markets. Building its portfolio on these three calibres places Medef on that line of demand; the status of its documentation and test processes has not been made public.
Are 5.56x45mm and .223 Remington the same thing?
The two calibres are dimensionally very close but their specifications are separate: the 5.56x45mm NATO is defined by a military standard and the .223 Remington by the SAAMI and C.I.P. civilian specification, with different test pressures and different measurement of throat geometry. For that reason producers list the two as separate items, and Medef’s catalogue likewise treats 5.56x45mm FMJ/SS109 and .223 Rem FMJ as different products. Compatibility questions at the level of user safety fall within the remit of the firearm manufacturer and the relevant specification documents; this file reports the distinction at industry level.
A dual inventory reality: NATO and Eastern Bloc together
Medef’s production of 7.62x39mm and 9x18mm Makarov extends the portfolio beyond the NATO axis. Many armies and law enforcement agencies around the world operate modern NATO-calibre weapons alongside former Eastern Bloc inventories; Kalashnikov-derived rifles and Makarov-class pistols remain in service in dozens of countries. A supplier producing both axes can answer that customer profile from a single source. Medef’s customers in these calibres are not officially disclosed; product details are in the pistol and rifle ammunition files.
What standards conformity requires in production
Production to standard requires dimensional and pressure measurement in every batch, laboratory control and test firing. In its corporate texts Medef describes the quality laboratory and the test firing process as part of the production chain; component integration running from the primer to the case and bullet allows tolerances to be managed under one roof. Independent audit reports are not public; ISO 9001, ISO 14001 and ISO 45001 logos appear on the company website.
Frequently asked questions
Does Medef produce ammunition to NATO standard?
The company produces 9x19mm, 5.56x45mm (SS109/M855 in the catalogue) and 7.62x51mm and carries the NATO logo on its site; the scope of its documentation is not officially disclosed.
What is the difference between SS109 and M855?
They are designations of the same NATO reference design: SS109 is the bullet in the standard, M855 the US production variant.
What are C.I.P. and SAAMI?
They are the bodies that publish civilian cartridge and firearm specifications; C.I.P. is the reference in Europe, SAAMI in the United States.
Why does Medef produce an Eastern Bloc calibre?
Inventories using 7.62x39mm and 9x18mm are widespread worldwide; offering both axes gives a supplier a broad customer profile.
Does Medef hold STANAG documentation?
Not officially disclosed.
Sources and verification note
- https://en.wikipedia.org/wiki/5.56%C3%9745mm_NATO — STANAG 4172, SS109 (Accessed: August 12, 2026)
- https://en.wikipedia.org/wiki/7.62%C3%9751mm_NATO — NATO standard (Accessed: August 12, 2026)
- https://en.wikipedia.org/wiki/9%C3%9719mm_Parabellum — calibre information (Accessed: August 12, 2026)
- https://en.wikipedia.org/wiki/9%C3%9718mm_Makarov — Eastern Bloc standard (Accessed: August 12, 2026)
- https://www.medefence.net/rifle-ammunition/ and /pistol-ammunition/ — product list; NATO, C.I.P. and SAAMI logos in the page footer (Accessed: August 12, 2026)
- SSB 2026 catalogue — SS109/M855, .223 Rem, subsonic and hollow point records
Standards information was drawn from encyclopedic sources; because the scope of Medef’s documentation and certification has not been disclosed, only the use of logos on its site is reported. The file gives no compatibility advice to users; it remains at the level of industry information.
