Do you have a spare AR15 bolt carrier group or an AR15 .22LR conversion kit and need a protective case for storage and transport?
CMMG brand .22LR conversion kits for the AR-15 brand of rifles are shipped in a cheap plastic tube. It’s very important to store your conversion kit in the tube when not in use so that it doesn’t get bent or damaged in storage or transport. I also keep the rifle’s expensive regular bolt carrier assembly in the tube while employing the conversion kit in the rifle so that it doesn’t get damaged should it be accidentally dropped on the ground. Unfortunately the clear plastic tubes that come with the conversion kits are fragile and will eventually become brittle and crack (as seen in the photo above).
I made a replacement storage tube using a piece of 1 1/4″ diameter PVC pipe and two end caps (as seen in the photo above on the right). I cut the pipe so that the conversion kits fits with little play. I glued one cap onto the tube. The other cap will fit on the tube snugly and not come off unless it is pulled off with a small amount of force. I labeled the tube so that no one would mistake it for a Terminator style pipe bomb.
If I were making another one I would glue a small piece of soft foam in the insides of each end cap so that the conversion kit or bolt carrier assembly would fit nice and snug without any slop.
The total cost of the new storage tube was about $7 US.