Current models AT, AT-X, AX Short Action all are switch barrels, can also use barrels for the AW and AE older models. AT is more of a base model, AT-X is the competition model, different chassis, barreled action sits lower in the more, has a competition trigger. AX is basically the full meal deal, with the fully adjustable aluminum rear but stock and enclosed forend. You can adapt the AX but stock to the AT style guns.
Then you have the long action ASR, AXMC and PSR, all use a bigger shank barrel M30 (1.350 is what we get here in the states), can be adapted all the way down to 308 size cases with bolt and magazine changes. Mags are also double stack like the short action variants. Barrels are way rarer to find and way more expensive than that of the short action rifles. The MC and PSR are really not available anymore, AI has gone toward the ASR which has a thumb safety now, and a uglier stock and grip (fight me) to be more like a AR15. You also have the older AWM (300WM) AWSM(338LM) and Pre 2014 AX which are all pretty much the same action and uses the older smaller M27 shank but those are single stack guns.
There are some nuances to the AI line of rifles, but not too difficult to understan
Anybody want to give me a quick and dirty Cliff's Notes on the different AI models and the the pros/cons between each mo
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