There’s multiple rifles that are either no longer obtainable or sitting in the mission editor.
Karabiner 98k Trench
The Karabiner 98k fitted with a trench magazine is a premium weapon that was available only to those who backed the game during the crowdfunding period in 2016.
The Karabiner 98k “Kriegsmodell” with ZF-42 was available during alpha testing, but was temporarily removed, and, as such, is not available in the game properly.
The [Lebel Model 1886 M93] was a weapon equipped on all members of one of the premium Axis Rifleman squads, namely, 3/115 Siemensstadt Battalion 1st Volksturm Company, in the Battle of Berlin campaign.
The [M/28 Finnish Mosin-Nagant] is a weapon of all members of a premium Axis Engineer squad in Battle of Moscow campaign, namely the 206th Engineer Battalion, 206th Infantry Division.
The [Wz. 38M Maroszek]is the weapon of the premium Axis Engineer squad “17th Sapper Battalion, 17th Infantry Division.” As of now, it is unavailable for purchase, and, as such, it is limited to those players who purchased the pack before the sales were stopped.
I agree that the weapons that are only available in the editor should be implemented in some way, but the pre-order exclusive ones shouldn’t simply because that would rob them of their uniqueness.