Dating beretta 92
One major difference was that the Vetterli’s socket bayonet (stored reverse on the barrel) was replaced with a similarly stowed cruciform that could be swung into position on a hinge at the front of the barrel.
The decision to use these spike bayonets was because Cavalry were issued full length swords and the addition of a knife bayonet to their kit would make for a clattering mess.
As the bolt is pulled back the extractor claw drags the spent casing out of the chamber.
A spring-powered ejector presses against a groove in the bottom of the bolt that grows deeper towards the bolt face.
A spring-loaded follower meets the lowest cartridge and applies pressure upwards.
As the bolt travels forward is strips the top cartridge from the clip and feeds it into the chamber.
Many collectors have trouble at first determining the differences between Carcano rifles.
Lessons learned in North and East Africa left the Italian military itching for improved ammunition.
Their 6.5x52mm cartridge was the first of its kind and while that’s a proud accomplishment it had not shaken loose some design flaws.
But declaring war along in 1940 meant challenging other first rate nations and Italy would pay the price for their leader’s arrogance.
Any details on the overall development of the Carcano can be found in the article linked above.