FYI Polymer80 spectre kit is on sale at midwayUSA. normally these are $150 each. midway right now selling them for $100. limit 1.
https://www.midwayusa.com/product/1017510550/polymer80-spectre-80-pct-pistol-frame-kit-glock-polymer
https://www.midwayusa.com/product/1017510550/polymer80-spectre-80-pct-pistol-frame-kit-glock-polymer