Here is the link to Gunzilla http://www.topduckproducts.com. It is well suited for black powder.
As to the gas tube it is stainless steel, just drop one two drops down the tube and don't even think about it, after all it is a 15 dollar part, I probably get bore with the upper before I'll need to replace it.
As to the gas tube it is stainless steel, just drop one two drops down the tube and don't even think about it, after all it is a 15 dollar part, I probably get bore with the upper before I'll need to replace it.


















































