Ontos Side Rails - Inserts Remix

This is a remix of the middle piece of the Ontos Side Rails with widened holes to accomodate M3x4x5 inserts to try and make the connection sturdier (since I will be using it to attach a sling point) and to make it easier to assemble and disassemble without stripping plastic parts. It requires four (4) M3x4x5 inserts. Update 2025-12-14 Added both left and right rails files since they were not uploaded as single files in the original design.