I find batteries are a bit of a risky item that it's worth buying in country. They won't get seized but if you come up with a DOA one then it's a less of a hassle.
The stick I got is too big to fit in the gas tube so it has to go fully under the dust cover, it's as tight as you'd want I think.
Plus Duy talked to me about some of the fit issues of the various sizes, charger specs, and other little details. The only downer was them not coming pre-wired for Deans from the factory.
One other detail about these batteries is they're much lighter. The stick is 30 grams less and the tri-panel is 80 lighter. That's a pretty noticeable improvement.
Airsoft, where nothing is hurt but feelings.