SHIFT-7 goes to weapon view IIRC.
Yes, that's also what I've been using in order to assess and reach a conclusion about this subject.
And also, by pressing '0' (zero) in the main keyboard after 'SHIFT+7' you can freely move the view around the weapon and even have some zoom in and out ability.
P.S. watching a cbu explode in DCS has been the cause of far too many CTDs and massive lag spikes, not sure it's worth it
There's actually a relatively easy "fix" for this issue which involves removing the 'ground', 'ground1' and 'ground2' files from the 'medium' and 'high' folders located at:
\DCS World\Bazar\Effects\PFX
If I'm not mistaken this removes high and medium quality explosions within the game.
This eliminates stutters when there's massive explosions such as when a Cluster bomb explodes and should also help with other related issues and at the same time it doesn't seem to be any massive loss in the explosion's graphical quality, specially when viewing them from the cockpit.
But I agree that this issue with DCS is stupid and it's unbelievable that after several years that ED never solved this same issue!