AR-15 Upper Bolt/BCG Keeper and Wall Hanger

thingiverse

This is not a weapon, nor a functional part for any weapon. I designed this to aid in storage of my extra uppers by functioning as both a dust cover and a solid block to keep the bolt carrier group from falling out. I've seen commercial versions of this that all require the use of proprietary retainer pins, but I wanted something that I could pop on and off with friction. Files included for both Versions 1.1 and 1.2. The only difference between them is the size of the keyhole slot. No supports needed, and I always print on rafts for consistency, but there's enough surface area that they shouldn't be needed. My test prints have been hot and fast on eSun PLA Plus with no issues. Keeping the infill down allows for a little flex on the friction points. Sliced in Cura. I may eventually add versions with caliber information on the sides, but that might be a while. Currently, I'm calling this complete with Versions 1.1 and 1.2. =============================================== Version History: Version 0.0 I started with nguyenkvvn's DS1913 frame and chopped off all the unneeded bits. I then added some spheres to align with the takedown pin holes in a mil-spec upper to slip inside them and hold the cover on and I cleaned up the sides. Version 0.1 Made adjustments to the internal and friction geometries. Printed and verified functional, but there's still some fine tuning that I'd like to do. Currently, the forward end sits a little loose, but the rear end is snug enough to hold it on. Version 1.0 Made adjustments to the internal and friction geometries. Printed and verified functional, but front end is still a little loose. Added Thing information to inside of cavity. Smoothed sides for aesthetics, beefed up front end, and corrected legacy artifacts in end cap internal geometry that was causing weird prints without using "print thin walls" feature. Version 1.1 Adjusted front end friction geometry. Performed additional artifact cleanup on cap end. increased sized of Thing information and changed to raised versus inset text. Text and cap both now print clean without use of "print thin walls" function. Thickened the bottom and added a keyhole slot at the request of a friend that wanted to hang it on a wall instead of sit in upright in a safe like I do. Version 1.2 Increased size of keyhole slot from 6mm opening x 4mm slot x 10mm center length to 10mm opening x 5mm slot x 14mm center length to allow for larger screws.