Don't know how it works yet - Hogue Sig P238/P938 Aluminum Mainspring Housing Checkered Firearm Grip

I ordered the part to replace the main spring housing on my Sug P938. What the description does not tell you is whether it is a new or old version. I ordered what I thought was the old version so I would not have to replace the sear spring. Unfortunately what arrived was the new version of the main spring housing. It looks great and fits great. However I had to order the new sear spring and will have it all together when it arrives.