The Cloak Industries AR-15 Assisted Reset Trigger H3 Buffer Spring Kit enables proper operation and eliminates most cycling issues with an Assisted Reset Trigger equipped AR-15. This kit pairs a carbine length Assisted Reset Trigger buffer spring with an H3 buffer in a convenient package that easily drops into your lower receiver. Compatible with the The Triggered Company Disrupter Assisted Reset Trigger and MFR56 Upper Receiver.