https://www.mcarbo.com/ Not sure if this is the correct forum to put this but I need to give this company so credit!!! They have outstanding products that do EXACTLY what they say AND they follow up to make sure your happy with it. Its a rare thing these days! I used their Mossberg trigger kit (Trigger spring, and hammer spring) both of which were clearly better than stock and did exactly what they said they would do. They also sent a follow up email to make sure I was happy with it AND they sent me a 10 % discount just for buying from them!!! https://www.mcarbo.com/store/p/36-Mossberg-Shotguns-500-/-835-Trigger-Spring-Kit.aspx That is what I bought a 15 dollar part and still got that great service. After dealing with Mossberg and Savage for a few issues with their rifle/shot guns buying from Mcabro was a shock. Discalimer! I do not work from them or get any kick backs.