special sinkers

Looking for a special type sinker, got a couple a few weeks ago from a gent at rayburn, they have a slide in bottom, and a loop to go over the hook after it is set and seems to be a rear running weight Cant seem to find them anywhere, if anyone knows where to buy them let me know please.

http://www.tacklewarehouse.com/Sizmic_War_Head_Weights_2pk/descpage-SWHW.html

Is this what you were looking for?

https://www.riveratackle.com/shop/tungsten-swanger-rig/

This might be it. Carlos, one of our own here on the TFF sells them.

Or, you could just use a crappie bell sinker for pennies, like we've been doing for years.

yes it is thanks so much, I looked on tackle warehouse but could not find it thanks again