[lagrange point1]

There would be a recoil. The momentum of a system is conserved, according to Newtonian Laws, so the momentum of the projectile (m_proj x v_proj) is equal to the momentum of the launch system (m_launch x v_launch) in the opposite direction, regardless of the launch mechanism.

It's not just a suggestion, it's the Law! (according to Newton)

[MCCC]

I don’t believe I am breaking Newton’s law.. The momentum is not occuring down the long axis of the ‘barrel’ but between the magnets exerting force imparting momentum inward and the projectile exerting force outward in response. Thus the momentum sum continues to zero itself. Thus my continued response that there is no recoil in the classic sense.