PCC AR Minimal Boltkeeper

When I travel to Steel Challenge I take my PCC in 2 parts. Some bolts can slide easier out the back depending on your setup (some bolts can just drop out!). I needed a way to easily “lock in” the bolt to the upper. It prevents it from moving back and forth even if it doesn't slide out. This prints in 1 piece in TPU or TPU for AMS.