EZ22 bolt spring plug

Update 6/29/2022- I was able to do some testing. The mod worked quite well. I was able to get around 20 rounds in, that successfully ejected, before I had an unrelated issue with the barrel coming unglued. More testing will be done in the coming days. Experimental and untested. This is intended to replace the rubber band with a spring. Assemble upper to lower receiver. Insert spring behind bolt and install plug into the lower receiver buffer tube threads. Spring located here. https://www.menards.com/main/hardware/fasteners-connectors/specialty-fasteners/springs/midwest-fastener-reg-53-64-x-3-zinc-compression-spring-1-count/88033/p-1444440207146-c-9553.htm?tid=473015708422502303&ipos=1