Ernest, it looks like that feature is no longer available. It is not on my search options either.

it worked yesterday but not today

If I click on menu then products, lastly browse by manufacturer it's not working that way. If you type in the manufacturer into buds search like Beretta, or sig it'll let me search threw their products that way. Hopefully buds will straighten this out soon. Hope this helps.

Ernest, the option has been removed for what ever reason. I just search on the manufacturer from the search field and then select handgun, long gun etc which does essentially the same thing. Cheers and stay safe!