The phrase "potent arms" is correct and can be used in written English.
It is typically used to describe someone's strong or powerful abilities or resources. Example: "The country's potent arms in technology and innovation have propelled its economic growth in recent years."
From an immunological standpoint, the activation of the complement cascade, a potent arm of the innate immune response, has been associated with fatal outcomes in septic patients [ 6- 9].
Both America and Britain have felt the sting of freelance asymmetrical war-makers not associated with a particular state but with a transnational religious cause that uses potent small arms and explosives to unravel western societies and confound their defences.
Armed with even a low yield nuclear war head makes it a potent weapon of terror regardless of how unreliable its guidance system would be.
While al-Assad increasingly faces armed insurrection from those weary of life in his Big Brother world, the most potent weapon in opposition hands is the mobile phone.
NKT lymphocytes are a potent immunoregulatory arm of the innate immune system that recognize glycolipid antigens presented on the nonpolymorphic MHC-class I-like CD1d molecules.
Fortunately, its charms are more potent than its arms.
Sabotage and trickery have been weapons every bit as potent as small arms, mortars or suicide bombers.
And always there are the small, potent gestures for the arms that establish both formal pattern and dramatic nuance.
Historically, Egypt's Islamist cadres, even at their most potent, have lacked the arms, the leadership, the terrain, and the internal and international networks that would enable them to challenge the U.S.-equipped and U.S.-funded Egyptian military full on.
