[ctdonath2]

No.

F&F was predicated on standard straw purchase from legal civilian dealers. Grenades would be nigh unto impossible with lots of very deliberate & unusual paperwork, adding $200 to the cost of each one sold.

Yes it is technically/legally/logistically possible to make that scenario happen, but falls into the “ain’t happenin’” category. Would take a special level of genius sociopath to take F&F there.

[JoeFromSidney]

The grenades sent to Mexico were inert grenade hulls, which are fairly readily obtainable as "souvenirs" or "paperweights." However, they can be filled with explosives, although the arming mechanisms are not that readily available. In any case, exporting even the inert hulls is illegal.

[RitchieAprile]

full auto stuff would also be subject to ‘unusual paperwork’.

Mexico needs to look to its own military and those of its neighbors as a source for these munitions and weapons.