AR15 Upper Hold Open for Cleaning

I made this little hold open for cleaning the upper of the standard AR15. I've been told by some that it really comes in handy and by others that there's no use and to just take it fully apart. I figured I'd let the community decide. I printed it in PETG as it will probably hold up better to CLP type oils than PLA would. You can probably print it in PLA and be fine. If it ends up degrading, then you can print a new one very cheaply.

If you print this and it was useful or if you have any commentary on design, feel free to comment to let me know. Happy printing!