Ringcut Frag Grenade

Ringcut is a scored-shell fragmentation egg sold behind the warrant counter — not the junk-stall scrap rings. Preformed fragments, reliable delay, and a receipt that assumes you already have the paperwork. It turns a hatch vestibule into a bad idea for anyone standing in it. Store in the foam brick they sell you; loose frags in a satchel is how boarding teams write incident reports about themselves. Habitats with thin bulkheads may ban these even under warrant — ask before you arm.