This is a TROY Trigger Guard, model SGUA-AMB-00BT-00.
The Enhanced Trigger Guard provides users with easy access to the trigger while wearing gloves and opens trigger area even in extreme conditions. With no sharp edges or corners" this trigger guard fills width gap on receivers. The Enhanced Trigger Guard is machined from hardened aircraft aluminum and rotates down like a standard trigger guard.
Features:
Hardened Aircraft Aluminum
Easy Use While Wearing Gloves