Fix the recoil on a physical gunstock

When I control the recoil on the virtual gunstock, all I have to do is lock the main hand and consistently lower the secondary hand. This does not work with a physical gunstock because when controlling the recoil of a weapon, you rotate both the main and secondary hands around the shoulder/base of the stock. This causes both the secondary and main arms to fall. As a result, the aiming mark goes beyond the optical window. This is especially felt when controlling the LMG recoil with a physical gunstock.

Suggestion. When the "Virtual stock" checkbox is disabled (or when "Physical Stock" is enabled - a new option), you need to move both hands around the shoulder/base of the stock to control recoil.