This magazine is closed at the bottom with a plate flush with the stock. This permits unloading the magazine without operating the bolt and functioning the cartridges through the mechanism. The magazine base is so constructed that it may be released on its hinge from below by pressure on the button in front of the triggerguard. The magazine and triggerguard are made in one piece.
This is commonly called a "gas flange." Magazine The Mauser bolt plug (called "bolt sleeve" on our Springfield) is made oversized so that a projecting rim on the forward part, covers the rear end of the bolt as a positive stop against any rearward flow of gas. When the lock is opened, however, or only partly opened, the position of the groove prevents the firing pin from snapping forward of its own accord under any circumstances. When the bolt is locked these flanges fit into corresponding grooves on the inside of the bolt. Spring to rest upon, having two flanges diametrically opposed. (Belgian) markings and or native markings were left to discretion of purchasing nation. Barrel lengths, stock types, slings, sights and calibers could be dictated by the purchaser. Belgium made these " Mauser System" rifles and carbines for general export. However, they have the wide gas flange, magazine follower bolt stop, an*d improved sights, etc. Mechanically these are all practically the same as the Gew.