The Foldy Boi is Foxtrot Mike Products’ folding ambi 9mm. People also write FoldyBoi or Foldy Boy. It is not a different brand. It is the VFM-9 platform on Foxtrot Mike’s folding lower — made in Boise, Idaho.
What you are looking at
VFM-9 is the 9mm upper (dual-charge or front-charge, several barrel lengths). Foldy Boi is the folding ambi lower those uppers usually sit on, and the nickname for the complete folding pistol. Search either name and you should land here or in the VFM-9 shop.
Why people talk about it
- Folds into a compact package for a truck, pack, or locker.
- Takes Glock-pattern 9mm magazines.
- Ambi controls. Dual charge on the current value uppers.
- Often paired with Foxtrot Mike’s RMB (recoil mitigation buffer).
Related names
MIKE-9 and the older FM-9 are the same company’s original 9mm AR line — more feature-rich, not the value VFM-9. See all platform names or folding and RMB explained.