Whats your favorite semiautomatic//self loading rifle of ww1?
World War 1 is not known for semiautomatic//automatic rifles mainly due to the enduring legacy of the Lee Enfield, Mauser, Lebel, Carcanno, Malincher and many, many more (bolt action rifles). This is probably due to two reasons 1.) They were generally unreliable. 2.) Most soldiers got bolt action rifles. These are the semiautomatic rifles I know of. If there are others please add on.
The Meunier Rifle
This Rifle was a result of a impressive self loading rifle program, it was accurate and very modern in its time. The Meunier was planned to replace the obsolescent Lebel but in 1913, such rearmament was cancelled due to the premises of the a "impending war" as the high command put it. They were not wrong. The Meunier was later produced as a stop gap for the forth-coming RSC 1917. Approximately 6500 were made, give or take a few hundred.
The RSC 1917
The cheaper form of the Meunier, the RSC 1917 used parts from both Berthier and Lebel in its construct. The Rifle was also fairly accurate and had many modern designs combined into it. The gun however was known to suffer from frequent stoppages (due to mechanical failings) and it was quite unwieldy. Although surprisingly it could handle the trench conditions pretty well (Dirt wasn't a problem apparently). The gun was only given to the best marksmen and squad leaders and the lucky poliu who got to use this gun had to go to "school" just to use this gun properly. 86,333 were made, the RSC 1917 was superseded by the RSC 1918. This was the first semiautomatic rifle issued in great numbers.
The RSC 1918
A major improvement of the RSC 1917, The RSC 1918 was a lighter, shorter and more reliable then its predecessor. The Rifle was shortened and mechanical parts were refined in the RSC 1918 and it proved its worth and gave excellent service in the Riff War. only 9500-20000 were made depending on the source. Technically the gun did not see action or saw very limited action in ww1, but it was adopted during the war thus giving it a place on this list.
Both the RSC 1917 and 1918 were converted into bolt actions later on by unplugging the gas port. Though some guns were simply unplugged in order to return it to its original form. It was prominent in colonial troops and possibly the Gardes Mobiles.
The Fedorov Advomat was truly a weapon way ahead of its time. It is arguably a (possibly the first) predecessor of the assault rifle. However there is this Italian rifle than dates back further apparently. The Fedorov Advomat was adopted in 1915 and used japanesse surplus ammo. The gun saw very limited action in World War 1, though it did see subsequent action in the Russian Civil War and the Winter War. About 3200 were produced.
The Mondragon arguably was more of a dream then an actual practicality.
see Cruffler.com for more info on that. The Mondragon was by all regards, unreliable. Dirt jammed it easily, everything had to be in perfect working order, it had poor accuracy and it had gas fouling problems. Yet, it deserves a good name for two reasons 1.)For 19th century standards, it was innovative and 2.) It was the first serious attempt to arm a army with semi automatic rifles (though it didn't work out to well)
There was another german semiautomatic rifle, model 15 or something, it was highly advanced for its time though it was very expensive to produce.
Browning Automatic Rifle
The BAR is not remembered for WW1, and for good reason, it saw almost no action in the great war (as the high command worried about it bieng captured). It would later make its career in WW2. A reliable gun, though it seems more a support weapon than a individual rifle. Over 100,000 were made.
(Like we need a picture)
Weapons for consideration: Though not adopted
Both the British and Italians also had thier share of experimenting with semi automatic rifles though the Faqular Hill had a poor showing and the Italian version also had failed to impress the governments that tested it.
Wow, that took a while.