[Catalyst-]

pawn Код:

public OnPlayerEnterCheckpoint(playerid)
{
    SetPlayerPos(playerid, 286.800994,-82.547599,1001.515625);
    SetPlayerInterior(playerid, 4); // This is what you was missing
    SendClientMessageToAll(COLOR_RED, "A player has entered an ammunition store!");
    DisablePlayerCheckpoint(playerid);
    return 1;
}