I've been buying and scavenging for mods non-stop and I can't seem to find any mods that go into a Detonators "Scope" slot. While it makes sense that you wouldn't really need a scope for a Detonator type weapon there is a problem that arises once you find a Legendary Launcher. For example I found the following weapon in a level 3 Lock Box:
Legendary
VBI GL-1 Ground Pounder
Synergy: Grenadier
[1] -10% Recoil
[2] -20% Recoil
[3] +5% Grenade refresh on kill
[4] +10% Grenade refresh on kill
+0.40 Full Damage Radius
25% of stowed weapon clip reloaded on kill
x1.10 Fire Rate
Now the problem is that it is currently impossible to obtain my Level 4 Grenadier Synergy with this weapon because there are no Scope mods in the game that I can attach to a Launcher. Please rectify this in a future patch! Thank you. (^_^)v


