diff --git a/InvenTree/InvenTree/static/css/inventree.css b/InvenTree/InvenTree/static/css/inventree.css
index 3724835621..550884608f 100644
--- a/InvenTree/InvenTree/static/css/inventree.css
+++ b/InvenTree/InvenTree/static/css/inventree.css
@@ -29,6 +29,39 @@
     padding: 10px;
 }
 
+/* Progress bars */
+
+.progress-bar {
+    height: 25px;
+    background: #eee;
+    border-radius: 5px;
+    border: 1px solid #ddd;
+    width: 100%;
+    position: relative;
+}
+
+.progress-bar-value {
+    color: #000;
+    position: absolute;
+    top: 0px;
+    width: 100%;
+    left: 0px;
+    font-weight: bold;
+    font-size: 120%;
+}
+
+.progress-bar-inner {
+    height: 23px;
+    width: 20%;
+    text-align: center;
+    vertical-align: middle;
+    background: #3a3;
+    opacity: 40%;
+    position: absolute;
+    top: 0px;
+    left: 0px;
+}
+
 .qr-code {
     max-width: 400px;
     max-height: 400px;
diff --git a/InvenTree/order/migrations/0024_salesorderlineitemstockassociation.py b/InvenTree/order/migrations/0024_salesorderlineitemstockassociation.py
deleted file mode 100644
index bad3914a74..0000000000
--- a/InvenTree/order/migrations/0024_salesorderlineitemstockassociation.py
+++ /dev/null
@@ -1,23 +0,0 @@
-# Generated by Django 3.0.5 on 2020-04-21 00:14
-
-from django.db import migrations, models
-import django.db.models.deletion
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('stock', '0026_stockitem_uid'),
-        ('order', '0023_auto_20200420_2309'),
-    ]
-
-    operations = [
-        migrations.CreateModel(
-            name='SalesOrderLineItemStockAssociation',
-            fields=[
-                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('line', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='stock_items', to='order.SalesOrderLineItem')),
-                ('stock_item', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, related_name='sales_order', to='stock.StockItem')),
-            ],
-        ),
-    ]
diff --git a/InvenTree/order/models.py b/InvenTree/order/models.py
index 7a694fbc8d..9c6d5dcbb8 100644
--- a/InvenTree/order/models.py
+++ b/InvenTree/order/models.py
@@ -383,19 +383,3 @@ class SalesOrderLineItem(OrderLineItem):
         query = self.stock_items.aggregate(allocated=Coalesce(Sum('stock_item__quantity'), Decimal(0)))
 
         return query['allocated']
-
-
-class SalesOrderLineItemStockAssociation(models.Model):
-    """
-    Associates StockItem objects with a SalesOrderLineItem.
-    This model is used to match stock items with a sales order,
-    for the purpose of sale / packing / shipping etc.
-
-    Attributes:
-        line: ForeignKey link to a SalesOrderLineItem object -> A single SalesOrderLineItem can have multiple associated StockItem objects
-        stock: OneToOne link to a StockItem object -> A StockItem object can only be mapped to a single SalesOrderLineItem
-    """
-
-    line = models.ForeignKey(SalesOrderLineItem, on_delete=models.CASCADE, related_name='stock_items')
-
-    stock_item = models.OneToOneField(StockItem, on_delete=models.CASCADE, related_name='sales_order')
diff --git a/InvenTree/order/templates/order/sales_order_detail.html b/InvenTree/order/templates/order/sales_order_detail.html
index 907effebc7..64b75358da 100644
--- a/InvenTree/order/templates/order/sales_order_detail.html
+++ b/InvenTree/order/templates/order/sales_order_detail.html
@@ -50,14 +50,6 @@ $("#so-lines-table").inventreeTable({
             title: 'ID',
             visible: false,
         },
-        {
-            field: 'line',
-            title: 'Line',
-            formatter: function(value, row, index, field) {
-                return index + 1;
-            },
-            width: 50,
-        },
         {
             sortable: true,
             field: 'part',
@@ -80,7 +72,12 @@ $("#so-lines-table").inventreeTable({
             field: 'quantity',
             title: 'Quantity',
             formatter: function(value, row, index, field) {
-                return +parseFloat(value).toFixed(5);
+                return `
+                <div class='progress-bar'>
+                    <div class='progress-bar progress-bar-inner' style='width: 50%;'></div>
+                    <div class='progress-bar-value'>${row.allocated} / ${row.quantity}</div>
+                </div>
+                `;
             }
         },
         {
diff --git a/InvenTree/stock/migrations/0027_stockitem_sales_order.py b/InvenTree/stock/migrations/0027_stockitem_sales_order.py
new file mode 100644
index 0000000000..048609ae5f
--- /dev/null
+++ b/InvenTree/stock/migrations/0027_stockitem_sales_order.py
@@ -0,0 +1,20 @@
+# Generated by Django 3.0.5 on 2020-04-21 05:03
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('order', '0023_auto_20200420_2309'),
+        ('stock', '0026_stockitem_uid'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='stockitem',
+            name='sales_order',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='stock_items', to='order.SalesOrderLineItem'),
+        ),
+    ]
diff --git a/InvenTree/stock/models.py b/InvenTree/stock/models.py
index 51b61ff3fd..f009f09791 100644
--- a/InvenTree/stock/models.py
+++ b/InvenTree/stock/models.py
@@ -126,6 +126,7 @@ class StockItem(MPTTModel):
         build: Link to a Build (if this stock item was created from a build)
         purchase_order: Link to a PurchaseOrder (if this stock item was created from a PurchaseOrder)
         infinite: If True this StockItem can never be exhausted
+        sales_order: Link to a SalesOrderLineItem (if this stockitem has been allocated to a sales order)
     """
 
     def save(self, *args, **kwargs):
@@ -353,6 +354,12 @@ class StockItem(MPTTModel):
         help_text=_('Purchase order for this stock item')
     )
 
+    sales_order = models.ForeignKey(
+        'order.SalesOrderLineItem',
+        on_delete=models.SET_NULL,
+        related_name='stock_items',
+        null=True)
+
     # last time the stock was checked / counted
     stocktake_date = models.DateField(blank=True, null=True)