NATO STANAG 4517 PDF

Ordnance.

For the purposes of this STANAG, an ordnance is defined as having a calibre normally greater than 40 mm and a rate of fire of less than 100 rpm and consists of a barrel assembly, breech assembly and loading system complete with, if fitted, an integral automatic ramming, loading and extraction system.

Further definitions are :

Barrel Assembly. The barrel assembly comprises the barrel and, if fitted, the muzzle brake, fume extractor, muzzle blast deflector, thermal sleeve and cooling system.

Breech Assembly. The breech assembly comprises the breech ring, the breech block (or blocks in the case of split block breeches), the breech block opening mechanism, the firing mechanism, the extractors and, if fitted, the breech obturators and tube/primer loader.

Cradle Assembly. The cradle assembly comprises the recoil system incorporating the buffer cylinder(s), recuperator cylinder(s), control cylinder(s) and any balancing devices.