sestoppelman
AH ambassador
Mine is from 1984 and still has the release inside the trigger bow. And I dont know about this rifle, but mine has a second recoil lug bedded forward of the receiver in the barrel channel.Post 1972 pre 1981. From 1981 onwards, these rifles started getting built in the USA and the magazine base plate release catch started getting located OUTSIDE the trigger bow (like a Winchester Model 70 or BRO ZKK602).