![](https://discuss.tchncs.de/pictrs/image/a99d6771-39df-45b5-9d4e-a213ed480f50.jpeg)
![](https://lemmy.world/pictrs/image/c47230a8-134c-4dc9-89e8-75c6ea875d36.png)
i thought that RG-42 was smooth inside, and i still think that RGD-5 is
anyway, these are still not pre-formed fragments, because some of these grooves will not cause fragments to separate
it’s not that different from any other weapon that throws around fragments, just that PFF covers highest area or whatever metric you choose per kilogram of weapon. this works only if you don’t care too hard about cost and can ignore some engineering constraints (such as acceleration survivable by weapon etc)
e: you can see in that video at 5:50 how a few of these squared remained unseparated as a single fragment
not even peace deal, that was ceasefire. when all that was given up only then russians wanted to negotiate peace deal