Centennial Defense Systems Glock 43 Lower Parts Kit 5lb Mag Catch Spring 50percent Power Trigger Spring Glock Gray LPK-EXT-MOD79. Specifications for Centennial Defense Systems Lower Parts Kit For Glock 43: Manufacturer: Centennial Defense Systems Gun Make: Glock Gun Model: Glock 43 Package Contents: Centennial Defense Systems Lower Parts Kit For Glock 43 Magazine Catch Spring (2.5lb or 5lb) Slide Lock Spring Trigger Spring (Factory Weight +25percent Power +50percent Power) 3.5lb Connector Tango Down Slide Release Extended Mag Release (Serrated or Stippled) Extended Slide Lock Lever Trigger Pin Trigger Housing Pin What firearm models does the manufacturer say Centennial Defense Systems Lower Parts Kit For Glock 43 is compatible with? The manufacturer suggests that Centennial Defense Systems Lower Parts Kit For Glock 43 is compatible with Glock 43Centennial Defense Systems LPK-EXT-MOD79: Glock 43 Lower Parts Kit 5lb Mag Catch Spring 50percent Power Trigger Spring Glock Gray