Full Idea
Possession of a right (such as self-defence) does not always imply that one has additional rights to whatever they need (such as a handgun) in order to exercise the first right.
Gist of Idea
Having a right does not entail further rights needed to implement it
Source
Tuckness,A/Wolf,C (This is Political Philosophy [2017], 5 'Is there')
A Reaction
The right to life entails a right to food (but not to a banquet), so it is a stronger right than self-defence. I have no obligation to let you defend yourself against me, but I may have an obligation to feed you if you are starving. (Distinction here?)
Book Reference
Tuckness,A / Wolf,C: 'This is Political Philosophy' [Wiley Blackwell 2017], p.120