Langdon Tactical Technology PX4 9mm/.40 Caliber Trigger Job in a Bag 192 oz Black Beretta PX4. We now offer what we call "Trigger Job in a Bag". Purchase this kit to receive all of the important parts involved in a trigger job that are pre-polished and stoned to give you close to the same trigger job you would get if you sent it to us. Specifications for Langdon Tactical Technology PX4 9mm/.40 Caliber Trigger Job in a Bag: Manufacturer: Langdon Tactical Technology Color: Black Gun Model: Beretta Px4 Storm Compact 9mm Beretta Px4 Storm Compact .40 S&W Gun Type: Pistol Package Contents: Langdon Tactical Technology PX4 9mm/.40 Caliber Trigger Job in a Bag What firearm models does the manufacturer say Langdon Tactical Technology PX4 9mm/.40 Caliber Trigger Job in a Bag is compatible with? The manufacturer says that Langdon Tactical Technology PX4 9mm/.40 Caliber Trigger Job in a Bag is compatible with Beretta Px4 Storm Compact .40 S&W Beretta Px4 Storm Compact 9mmLangdon Tactical Technology LTT-PX4-TJIB-129: PX4 9mm/.40 Caliber Trigger Job in a Bag 192 oz Black Beretta PX4