For a product to be imported it must bear stamping from the country of export. You are now assuming that customs is in cahoots with leapers and the MI plant in the states that is shipping these products is fictitious. If so where are the parts going that are being made there? TO CHINA! Mind is blown.
The point is UTG and the equipment on the S&W is Merican, then again maybe their raw inputs were Chinese .. Duh duh duh another epic discussion. Then again if the OP's rail is aluminum and he is not using it to pry oper doors or As a substitute for a hammer does it really matter what composition of aluminum alloy the rail is so long as it is in spec enough to attach to the rifle securely and accept the intended pictany attachments.
We all know TDC opinion on Chinese made goods, but after the last Norinco thread I saw you post in I am fairly certain your opinion is founded and perpetuated by misinformation.
For the record I don't own and smith and Wesson products or UTG. So I have no dog in the fight. If mmattocks product did come from China, it came from the Taiwan plant, so that would be decent enough quality. It is only a rail after all on a .22 Lr I wouldn't lose sleep over it either way.