There's no weapon, actual or figurative, involved if I decline to have sex with you.

And as to the "negotiation tool," it may be that sometime in the future, if MAGA men vote for real men instead of MAGA Trump-publicans, and act like real men, too, then I'm sure some women in the 4B movement will start having sex with them again. But right now, no. No amount of negotation by a MAGA hat wearer who voted for forced births even when a woman dies, women being forced back into the kitchen and not allowed elsewhere, and the removal of women's right to vote is going to suffice. These things cannot be negotiated away. They must be changed.