This is a Seekins Precision Trigger Guard known as the AR, model 0011510017.
The Seekins Precision Billet Trigger Guard is a functional upgrade for any Mil-Spec lower receiver. Machined from a solid piece of 6061-T6" the profile and size accommodate winter gloves while maintaining precise trigger control.
Features:
6061-T6 Aluminum
CNC Machined
Easy to Install
Eliminates the Gap Between the Receiver and the Trigger Guard