As security continues to be a primary challenge in post-Qadhafi Libya, the availability of weapons to nearby opposition groups and armed insurgencies is a source of major concern for Libya’s neighbours and the international community. Uncontrolled weapons proliferation and the rise of new armed groups have gone hand in hand across various conflict fronts. While what is known about weapons acquisition dynamics does not make it possible to establish a strict causal relationship, by observing variations in the various contexts, critical factors can be identified, such as the emergence of a protection market, the multiplication of tactical options and splintering processes, which facilitate comprehension of how greater circulation of weapons is related to regional volatility and destabilisation.