This is a Hiperfire known as the PDI, model PDIRG.
Single-stage" Drop-in Trigger for the AR Platform.
Features:
Power Drop-In
2 lb Pull
MIL-Grade Hammer Strike, No LPS, Ever
Titanium-Nitride & H&M BLACKNITRIDE+â„¢ Finishes: Exceptionally Smooth Feel, Enhanced Corrosion Protection, Polished Look
PCC Blowback Tough: Hammer Collision Bumper
Disconnector Crash Protection, Disconnector Spring Crush Protection
Flat Trigger Bow with a Backboneâ„¢
HIPERSHOE® Finger Pad Revolution™