Weapon problem (Metal Gear Solid 5: The Phantom Pain)

The problem is that it is impossible to select weapons, namely certain types of sniper rifles such as the M-2000 NL ,. The rifle is open, or rather bought, it is written that it costs 5840 GMP, but it is impossible to choose it, when preparing for a task it simply weighs a red crossed out rectangle. It is also impossible to order a cargo. Maybe someone faced such a problem?