Good morning to all and I hope all is well! So I ended up ordering the extended safety for the shadow 2 watched the installation video on YouTube and thought no problem easy… an hour goes by and no luck getting it to go through even with pressing down the little lever and doing everything in the video. So I rest the lower on the table and a spring and little black square piece falls out and now I don’t know what to do. The very small spring and small square piece I’m not sure how it goes back in to the pistol and no videos? Sorry for not knowing the correct wording of parts and use of them!