Lone Wolf Arms Glock 3.5 lb. Trigger Connector w/6 lb. Trigger Spring All Glock Models Except G42/43. Used by competition shooters self defense trainers and law enforcement officers alike. The 3.5# pound connector and 6# trigger spring combine to give your pistol a highly upgraded trigger pull with a minimal amount of work. The Lone Wolf 3.5 lb. Connector is an improved version of the Glock original minus connector bundled with our ever popular 6 lb. trigger spring (LWD-350-6). Specifications for Lone Wolf Arms Glock 3.5 lb. Trigger Connector w/6 lb. Trigger Spring: Manufacturer: Lone Wolf Arms Gun Make: Glock Gun Model: All Glock Gen 1-4 except Glock 42 Glock 43 Glock 48 Model Generation: 4 3 2 1 Additional Features: 3.5 lb trigger Features of Lone Wolf Arms Glock 3.5 lb. Trigger Connector w/6 lb. Trigger Spring: 25percent reduction in side thickness provides superior reset action. The connector has been redesigned with new spring weights and angles for improved geometry and feel Connector has a built in debris channel for improved performance. Connector works with ALL Glocks regardless of model or generation (EXCEPT G42/43) Package Contents: Lone Wolf Arms Glock 3.5 lb. Trigger Connector w/6 lb. Trigger Spring What firearm models does the manufacturer say Lone Wolf Arms Glock 3.5 lb. Trigger Connector w/6 lb. Trigger Spring is compatible with? The manufacturer suggests that Lone Wolf Arms Glock 3.5 lb. Trigger Connector w/6 lb. Trigger Spring is compatible with All Glock Gen 1-4 except Glock 42 Glock 43 Glock 48Lone Wolf Arms LWD-ConnectorSpring: Glock 3.5 lb. Trigger Connector w/6 lb. Trigger Spring All Glock Models Except G42/43