A nail mats.
I think he’s talking about deployable road spikes.
I honestly would like something that I can deploy that makes a melee stuck onto it when chasing me. Toooo much melee in lower PS. But it’d have to be on a long CD or better yet limited to 3 or 4 max (no ammo crates) or it could really be abused.
Could see that being a type of mine, when it hits a build reduces max speed by 30 KPH for 10 seconds. Can only have one active per module and only has an ammo of 2 so ammo boxes have limited effect.