They come on SB1 frames it is a Survivor not a Tamer as stated .There are some exceptions to the SB2 frames for rifle guidlines.The 22 Hornet and the 30/30 come to mind but they are lower pressure bbl's. But as a rule of thumb and for saftey You are correct . Just be careful even at $99 you got $30 shipping and the transfer fee which is $35 here. And you can buy these from Walmart for $185. $165 is a good deal though. Kurt