Unfortunately, this utterly revolutionary weapon came onto the scene a little too late, and was far too revolutionary. The biggest potential market would have been the US, if they had not biased their 7.62 mm rifle trials such that it was a foregone conclusion that some form of uprated Garand would be the winner. Within Europe, it was produced by the Dutch at Artillerie Inrichtigen in two forms, one for the Sudanese and one for the Portuguese. This is my Portuguese contract model, serial number A0004 (note the nonstandard magazine Housing, this one appears to be a prototype): The Portuguese are an interesting case in point -- they adopted the three major 7.62 mm rifle designs on offer commercially, i.e. FAL, H&K G3 and AR 10. Ultimately, they ended up with the G3 which I believe is largely due to the fact that it is the cheapest to produce even though, in my humble opinion, it is the worst of the three rifles and is positively agricultural. FN often preferred to sell complete rifles rather than allow countries to set up their own factories, the case in point being the Germans who adopted the FAL as the G1 until the licensing arrangements came to a head and FN would not allow the Germans to produce the G1 rifle themselves, hence their adoption of the G3. Here are some Portuguese troops somewhere in Africa with the AR 10: Action wise, this rifle pioneered both the multi-lugged bolt head locking into a barrel extension secured in an alloy receiver, and the Stoner-type gas system inside the bolt which would be carried over into the M-16 (which is, in essence, little more than a scaled down AR 10): The M-16 bolt assembly is absolutely dwarfed by that of the AR 10. Another interesting feature is that, under combat conditions, ammunition was to be supplied preloaded into magazines which could then be thrown away. The magazines are therefore correspondingly light, however they are incredibly reliable and seem to go on forever (touch wood). As a comparison, here is the AR 10 alongside the venerable old SLR (click image for bigger version): Weight wise, the AR 10 is a little lighter and the recoil is significantly more manageable (my wife is happy shooting it whereas she gets beaten up by the SLR). As for accuracy, this puppy in my hands has managed 1MOA off the iron sights at 50 m (sling supported), and I'm dying to try it at 100 metres with some seriously good ammo where it will hopefully be able to do a little better in terms of angle: The rifle is 100% reliable (after locktiting the gas regulator in place... ahem!), and gets an occasional outing in competition: There were some extremely green eyed people at that particular competition!