Ahh gutted man. We all do those little fuck ups. I had on my l85 a crack on the front of the fram so tried a fix of welding it at work but not clicking on it's cheap chineasium metal and just melted it before my eyes soon as the arc touch it, so had to buy a replacement part.
Definitely looking forward to getting the 416. Got a good deal with it 6 mags, the rifle and carry bag all for £500 seconds hand rifle but near new never fielded so hopefully got a great rifle there.