hello, i had a sr20 left handed in 9.3x62. in Europe i had eaw mounts and rings, i never used weaver rings on it but had a gunsmith installed leupold qr gunsmith base on it as the extra eaw rings were too expensive.
while some mauser 2000 were made and are like the heym sr 20-21, my best suggestion will be to contact heym and they will give you the exact time.