In case anyone stumbles across this post like I did, here's links for all of the above
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Wolverine/ Spectre WS-MCR 5.56 mm, 7.62 x 39 mm https://wolverinesupplies.com/shop/rifles/rifles/spectre-ws-mcr-sa-5-56-nato-18-7-475mm-dm-templar-style-lower
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Kodiak Defence WK180C Gen 2 https://kodiakdefence.com/product/kodiak-defence-wk180c-5-56-nato-18-7-non-restricted/
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Kodiak Defence WK181 Gen 2 https://kodiakdefence.com/product/wk181c/
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Lockhart Tactical LTAC 556 https://www.lockharttactical.com/raven556
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Black Creeks Lab SRV2 https://www.blackcreeklabs.com/semi-automatic-rifles/srv2-siberian/
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Maple Ridge Armoury Renegade https://mapleridgearmoury.com/renegade/
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Maple Ridge Armoury Maverick https://mapleridgearmoury.com/maverick/mra-maverick-rifle-308-win/