Plastic Magazine Single Round Insert For Tikka T-3 Plastic Magazine Single Round Insert New from OBS, the Plastic Magazine Single Round Insert allows you to use your existing magazine for your Tikka T-3 or Savage Model 25 rifle and create an efficient single round loading device. This insert is made from the same durable, long lasting Delrin as the rest of our products to ensure a lifetime worth of use. Yellow was chosen for safety and hi visibility when dropped in grass, dirt or snow. Simply pop the insert into your magazine and you're all set to effortlessly single load rounds into your rifle. It's the perfect addition for your varmint or long range shooting adventures.