That’s an M14. The Clinton Administration gave away tons of them to the three Baltic nations in the mid-late 1990s.
I remember when the giveaway happened...there had been a lot of hope at the time that the CMP might finally be allowed to sell/issue genuine M14s for target use. There were a LOT of angry people as a result of this.
Lithuania now makes its own 7.62 NATO ammo for them...a bunch of it (essentially brand-new but made pre-NATO-certification) was released on the surplus market maybe eight years ago. Shooters still speak reverently of it.
U.S. Rifle, 7.62mm, M14. Beautiful, and I don’t mean
the president of Lithuania.