You just posted what is known as a "pop " rivet . It clearly shows the TWO piece rivet and shaft . Since the 88 shows just 1 piece of metal , what you show has nothing to do with it .
---------- Post added at 09:24 AM ---------- Previous post was at 09:16 AM ----------
The rivets on Enfields are CLEARLY visible on the inside , SINCE there is a hole clean through the receiver . The Gew-88 is not visible on the inside [ since there is NO hole ] , BUT wait , why is it visible on the top !!! You can see the Enfield rivet head is LARGER than the shaft [ the 88 plug weld is the same size through out ] as that is how a rivet works . I can not wait to your next uninformed attempt to prove the impossible .