Yep Walmart AGM in all of ours. Bought one brand new last year before Colorado. Regulator on the ATV went out and was pushing 17 plus volts into the battery and cooked it. Took it to Walmart and exchanged for a new one.
I put an Odyssey extreme AGM PC1200LT in my Can Am last spring. Took a little plastic trimming, but that battery is awesome. The first 5 seconds of cranking is around 1200 amps. Makes a difference in sub zero temps. I also have Odyssey Extremes in my diesel pickup. Again, sub zero performance is incredible.