Just an observation on the "one stop" (definitive Nato clip for 7,62x51) and the earlier "two-stop" (Mauser rifle style clip).
It occurred to me that whilst the developmental stages of the stripper clip( and FN-FAL rifles etc) to use 7,62 ammo were predicated on the Mauser style clip and the shallow clip guide slots in the receiver, the "Mark 2" clips could also be used with Converted Bolt action rifles (ie, Mausers) which were already set up for a two stop clip...The width of the clip seems to be of importance as well, since the Mauser clip comes in two widths, the export size( for 7mm, 7,65mm and .30/06--mostly Latin American) and the narrow size, for 7,9mm (virtually restricted to German M98 rifles).
FN would have been looking at the latin American markets, already floodend with Wide cliped Mausers in various calibres, and some did convert Mausers into Police and training rifles in 7,62, whilst adopting the FAL designs in the 1950s...The two stop clip works very well here, although the later single stop design does work, albeit a bit stickily, in most Mausers as well.
The major user of "Converted" Mausers was Israel, and this could have been an original design facilitation for the IDF...they both adopted the FAL, and had the spare barrels for the Mauser 7,62 originally supplied by FN, (later made in Israel), but as the Israeli Mausers were by and large, originally German/Czech etc 7,9mm Mausers, with the narrow clip, there rests a problem...which clip did Israel use in its "clipped" 7,62 Ammo...
Any Israeli(Hebrew) marked clips out there? measurements please?
Regards, Doc AV