This Remington manufactured magazine latch assembly is for the model 770 bolt action rifle and is in very good condition with light wear. This assembly consists of the magazine latch, pin, and spring.  (file photo)

NOTE: Remington model 770 rifles with the following year/serial number have been observed with this part: 

243 Win: M72083803

270 Win: 71387626, H70017624, H70038356, H70056582, M71685872, M72146158 & M71664845

30-06 Sprg: H70000776, H70043516, M71661216, M72150174, M72152187, M72152449 & M72163671

7mm Rem Mag: M72115877

300 Win Mag: H70014540, H70052126 & H70005745