Hi Khearn i've used them they are not really for use in a rifle thats just been fired it smore for storage however. the abs plastic extrudes at 195c so the abs is not likely to melt in a firearm unless its very very hot letit cool for a minute or 2 and you should be fime

Has anyone ever used one of these? It looks like a nice idea, but I'm a little concerned that it might melt in a recent fired rifle. The idea of melted ABS in my chamber doesn't really appeal to me. :(