Re: input on trg22 vs.AI
Question is a bit vague, however, probably the best comparison in print is the Zak Smith article listed above.
Both are fielded military weapon systems, FWIW. One cannot go wrong with either choice. Most of the homework has been done for you by big budget military forces.
Notice how many guys just get both. I have shot both side by side numerous times and I like both equally as well. Perhaps it depends on your mood/preference but the stocks on each seem to either do it for some or for others it may turn them off. I like both. I like the AI thumbhole advantage of "resting/loading" a bit of the weight on my hand as well as seemingly greater stock control.
Both essentially provide similar accuracy. If not, you/optics/ammo are wrong.
I do not agree with AnchorStation's assertion the accessories for the TRG end up being equal in cost. There are many aftermarket parts for the TRG by top shelf MFG's that are just as durable and less expensive than factory parts.
For example, NEAR makes a fine scope mount that is at least half the cost of factory. Same for Harris bipod. Also, FYI; I have been less than pleased with the durability of my factory Sako bipod. I am extremely hard on my gear and thus expect a military grade system to be bulletproof but I have broken my bipod at least twice. It's balance, of course, with the pivot point above the barrel, is the best there is, IMO.
In addition, I believe the so called argument that the AI is more rugged than the TRG system/stock etc to be somewhat spurious.
I do not know of any major failures of any TRG stock or other part. Once again, remember both are military issue and one assumes the bidding process weeded out lesser/weaker designs and that both AI and TRG are sufficiently ruggedized to withstand normal combat operations.
Having said that, one can also assume sniper systems should/ought to be handled in a manner more consistent with care rather than "abuse" than, say, the treatment standard issue rifles usually undergo in combat. If one is not attempting to preserve the capabilities of a SWS then such poor handling may border on abnormal abuse and that is certainly not wise practice.
IMO, both triggers are excellent. Bolt manipulation egde for me goes to AI but that is mere subjective "feel". Both are short angle throws and very smooth and fast.
I have never had any ejection/extraction problems with either. Never had any issues with either magazine system.
If able, shoot both and see what you like. The AI thumbhole stock might not do it for you. I would bet you end up liking both and the decision will come down to either subjective issues of $/cost.