With Closer's help, a new mechanic is introduced: item tags appending an removing. To resolve a clipping issue like hand clipping through side attachments, on some guns you'll have to equip a foregrip mod before being able to equip laser sight and flashlight mod. There're also cases of guns having no attachment rails or a scope mount so a pre requirement mod is necessary before you can attach them. Look for "railhandguard" on the mp5 or pp19 or "pistolscopemount" on some pistols, in creative mode. This should also be a key part of the final release of the mod with the intention to "overhaul" some what the gun play.