Tried to search forum on this. I need to replace the nipple on my t/c renegade. I know my investarms hawken nipple has 6 X .75 threads and the spitfire nipple I got for it fits perfectly and works great. The same nipple will screw into my t/c renegade a ways but then stops and I'm not going to force it. I've looked around and it seems the nipple I need for the renegade has 1/4 X 28 threads. Is that correct? Want to be sure before I order. Thanks.