May require slight fitting. - TangoDown Vickers Tactical Gen4, Gen5 9mm/.40 Glock Extended Magazine Catch

I put these on every Glock I own. I have 3 of this exact part on three different Glocks(G17Gen4,G19X,G45). I have the Gen3 version on three other Glocks.
On 2 of the 3 Gen4/5 versions it did require about 10 seconds of light sanding to remove some flashing and material to make them move completely free of any drag or sticking. Other reviews have complained about it sticking/not working and therefore not recommending.
I recommend them as I put them on every Glock I own. Some other reviews also complain they don't stick out far enough or aren't big enough. They are not intended to be huge extended release buttons for competition. They are for tactical use. They are bigger and easier to press than stock ones.
So if you have a small piece of sandpaper and a minute of time it works perfectly. If you can't figure that out maybe ypu should follow the directions on the package that says to have a gunsmith install it.