Features of BlackHawk SERPA Level 3 Auto Lock Duty Holsters. SERPA patented Auto-Lock technology. Passive retention detent adjustment screw. Thumb-activated Pivot Guard for additional security. Full-length holster body protects rear sights. Specifications for BlackHawk SERPA Level 3 Auto Lock Duty Holsters, Heckler & Koch P2000/Heckler & Koch P2000SK, Right Hand, Matte, Black, 44H116BK-R. Heckler & Koch P2000, Heckler & Koch P2000SK. Handgun, Pistol loc: office 6/26/23a.