Randy is right they are not as robust as the older ones but i have not had a problem with mine but i will say I dont shoot the snot out of it either.
I have several leverguns with these sights, my marlins usually carry low power variable scopes as my eyes are failing me rapidly.
Another option i just received but have not had time to mount and check yet is this,https://pearsonstacrails.ecwid.com/ i am going to give some red dots a try on my browning 92s and muzzle loaders.