TPS Arms Enhanced Trigger Group AR-15 5.5lb Black. 5 lb trigger pull the TPS Enhanced Trigger Groups fits the bill. This trigger kit has all the parts you need to install your trigger. Specifications for TPS Arms Enhanced Trigger Group: Manufacturer: TPS Arms Color: Black Trigger Pull Weight: 5.5 lb Gun Make: AR Platform Gun Model: AR-15 Package Contents: TPS Arms Enhanced Trigger Group Disconnector Disconnector Spring Hammer Hammer Springs Trigger Trigger Spring Trigger Pins What firearm models does the manufacturer say TPS Arms Enhanced Trigger Group is compatible with? The manufacturer suggests that TPS Arms Enhanced Trigger Group is compatible with AR-15TPS Arms AR2005: Enhanced Trigger Group AR-15 5.5lb Black