2019-05-24 [☆] https://www.brownells.com/rifle-parts/receiver-parts/receivers/lower-receivers/special-edition-m16a4-stripped-lower-receiver-prod122916.aspx
lower, $52.99
guns guns.ar9

2019-05-23 [☆] https://www.midwayusa.com/product/197087/ar-stoner-enhanced-billet-upper-receiver-stripped-ar-15-9mm-luger-45-acp-aluminum-matte
upper, alt, $59.99
guns guns.ar9

2019-05-23 [☆] https://www.brownells.com/rifle-parts/barrel-parts/rifle-barrels/ar-15-barrel-9mm-16--sku100019289-84495-180087.aspx
barrel, $132.05
guns guns.ar9

2019-05-23 [☆] https://www.brownells.com/rifle-parts/receiver-parts/recoil-parts/recoil-buffers/ar-15-fm-9-heavy-buffer-prod105914.aspx
buffer, $20.00
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2019-05-23 [☆] https://www.deltateamtactical.com/United-Defense-Labs-9mm-Bolt-Carrier-Group-Enhanced-For-Both-Colt-Glock-Lowers-Highest-Quality-_p_6570.html
bolt, $99.99
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2019-05-23 [☆] https://www.righttobear.com/RTB-9mm-22LR-Slick-Side-Upper-Receiver-p/rtb-pcc-m4.htm
upper, $59.95
guns guns.ar9

2019-05-23 [☆] https://ar15tactical.com/9mm-ar15-reference-guide/
guns guns.ar9