I own and AW and considered in the recent past about going to an AX. I got behind an AX chassis system, but not the real thing. The notes about the AW vs. AX below then are part speculative, but hopefully helpful.
My issues with the AX chassis (full disclosure that I have not shot a real AX, just handled the chassis conversions):
- They got rid of a ton of foregrip space on the AW and replaced it with a metal tube that has more attachment points than I could ever use. I don't need 1,000 sq. ft. of picatinny rail on my rifle. I understand that military may need more places to mount NV, illumination, etc. But at some point it gets over the top.
- They got rid of the spigot mount which provided a very solid mounting point for a bipod and quick release. Now I'd have to mount a plate to the rail and a bipod to the plate. More parts to fail.
- To the point above, the new bipod images floating around from AI show it has the spigot mount still on it and you need to mount a plate on the AX chassis to use the spigot. So they got rid of the spigot mount of the AW that was solidly built into the rifle chassis, to replace it with a spigot mount anyway that now has to be bolted on and can come loose on the AX?
- They increased the mounting height of the scope on the AX raising the center of gravity and low bore axis cheek weld of the AW. The scope mounting is much higher on the AX than the AW and higher scope mounting is less stable and makes recoil control worse.
- The loss of rail foregrip space means it's harder for me to do positional shooting/sling shooting without having to grip the relatively narrow and rounded mounting tube. This is not as stable or comfortable when I tried it out. Sometimes when doing sling shooting you need to get your hand far up under the front mounting point. Same for weird shot angles that don't use the sling. Before I had the nice flat bottom foregrip that was stable. Now I have a much more rounded grip area that is potentially more wobbly.
- The front tube is also exposed bare metal so I wonder how cold it will be to handle in winter conditions vs. the plastic covered foregrip area they have today on the AW?
- The side of the rifle action is also more exposed metal so again it will be harder to handle in colder temps. I'd rather have the metal on the rifle that could be contacted with fingers be covered with plastic/composite if possible.
- The side insert magazine well loses structural integrity against side impacts and offers no real advantages that I can see. I can't think of a time where I've run out of ammo and haven't had to break position to reach for a magazine and insert it. Other than perfectly calm prone slow-fire with my magazines lying neatly next to my position, the side opened magazine well doesn't really buy me much. The straight insert AW magazine operation is simple and reliable. No need to rock and lock, etc.
- On the AW I can use the thumbhole stock if I want or switch to pistol grip sides if I want. On the AX you get only the pistol grip.
- The AX has more sharp edges, holes, and places to catch on clothing, straps, brush, etc. due to the fore end tube and hook like rear stock.
- Speculation: The very flat long bottom of the AW foregrip is likely more stable when doing barricade shooting than the relatively more rounded and narrower AX front tube. Have to test this however.
- The AX seems more like it is optimized for prone position shooting. It looks like a less comfortable rifle for non-prone shooting vs. the AW.
- The AX is only marginally lighter than the AW. Why didn't AI try to knock off a lot of the weight from the AW? Why not try to make their new rifle 1/3rd lighter for instance? I'm not a soldier, but I suspect most would much rather have a lighter weapon that was more comfortable to carry for long distances. It's easy to make a heavy gun and many manufacturers are doing that. AI should show some innovation here with new materials and go the opposite direction and make something lightweight and as durable as the existing AW.
- The adjustable trigger on the AX is fine, but seems more like a target rifle feature. However the trigger group should be made available on the AW if people want it. I am fine with the fixed trigger as it is one less thing to go wrong.
Then there are the marketing considerations that don't pertain to the shooter, but the AI brand:
- They took one of the most recognized, tested, unique, and successful sniper weapon systems in the world (AW) and changed everything about its looks and ergonomics with the AX. Companies that have tried this with their products in the past have had mixed success, and some really bad explosions (Remember New Coke?). If it wasn't broke, why fix it?
- They made the look of the AX imitate virtually every other PSR wannabe system on the planet, thereby eroding their unique brand image and look of the AI series. It now looks like every other tactical rifle coming out today. The AW chassis was and is unique and serious shooters (and even video game players!) know what it is. The AX looks like a Remington PSR, Sako M110, FN Ballista PSR, etc. now. The unique look is gone. Is that what they want?
- I am glad the PSR contract is over. I think it pulled all these companies the wrong direction. But I'm not military so I don't really know what they want. But if I was a soldier I'd want a lighter weapon and less sharp pointy bits to poke me and catch on my gear. Yet all the PSR weapons are heavy, have lots of picatinny madness and adjustable doodads all over that hang out like big meat hooks ready to grab anything that passes too close. The hyper elevated cheekrest and buttplate extensions are great examples. I think they are fine for target guns, but I don't know if I'd want that in combat or running around in the field all day banging through brush. They look fragile with parts to lose, bend, catch on everything, etc. I think a good rifle should be simple and smooth with solid adjustable parts (using spacers for instance) that won't break, rattle off easily and won't snag. This is exactly what the PSR-style rifles don't have.
Again I'm not a pro shooter or military guy so I'm just speaking from my own use banging the things around in the field for a few years and doing some competitions. So I guess in a way I'm being selfish about what I'd want, but I suspect I wouldn't be alone in these feelings. However the above is why I stuck with the AW over the AX.