Can anybody tell me about these???? Are they worth anything? Do they function well? Can you change out parts, replacement type like to make E4????

link?

They are about $6,000 and take a long time to sell.  For that price tag people will buy a NFA weapon.

These are actually very cool guns. They function quite well and they accept most M60 parts, including accessories to make it an E4. IIRC, there is a semi auto E4 already on the market. The price is quite high, considering that you could have a .308 1919A4 for 1500.00 which would probably give you the same thrill. I thought the price was outrageous until I learned that the going rate for LE or .gov purchase is around 7000.00 for a GPMG. Considering the price of a Class III M60, this is a much cheaper investment. They are a lot of fun, but personally I would by a semi auto Mag 58 before a M60.