I'm thinking about adding a 9mm upper to my existing AR15 lower.
Has anyone had any experience with the Foxtrot Mike FM-9 front charging upper?
https://fm-products.com/upper-receiver-glock/
https://www.youtube.com/watch?v=aHXLAUT-bMc
Has anyone had any experience with the Foxtrot Mike FM-9 front charging upper?
https://fm-products.com/upper-receiver-glock/
https://www.youtube.com/watch?v=aHXLAUT-bMc
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