Description
The FPC line has been one of Smith & Wesson's smartest ideas in years, and chambering it in 5.7x28mm might be the best fit yet. The flat-shooting, low-recoil 5.7 cartridge picks up real velocity out of a 16.25 inch barrel, and the blowback action paired with an integrated recoil buffer keeps the whole experience soft and quick on target. Unfolded, the carbine measures 30 and 3/8 inches. Fold it at the hinge and it shrinks to roughly 16 and 3/8 inches, small enough to ride in a backpack, range bag, or behind a truck seat without anyone giving it a second look.
Why the FPC 5.7 Folds Smarter
The big trick here is that the FPC folds sideways instead of over the top, so a red dot or scope mounted on the full-length Picatinny rail stays put and holds zero while folded. Deploying it is fast and intuitive: swing it open, insert a mag, rack the charging handle, and you're in business. The polymer stock holds two spare magazines with quick-release tabs, which means with the mag in the gun you're carrying all three included 10-rounders on the carbine itself. QD sling mounts on the stock and handguard plus M-LOK slots along the forend round out a very practical package.
Familiar M&P Feel in a 5.7 Carbine
If you've spent time behind an M&P pistol, the grip and flat-face trigger will feel like home, right down to the interchangeable palmswell inserts. It also feeds from the same magazines as the M&P 5.7 pistol, so pairing the two makes for a tidy setup. The 1/2×28 threaded muzzle comes capped with a protector and takes suppressors and muzzle devices without fuss, and 5.7 happens to be a caliber that suppresses really nicely out of a rifle-length barrel.
A Handy Do-It-All Package
Call it a truck gun, a trail companion, a varmint rig, or just a fun way to burn through 5.7 at the range. At around four pounds it carries easy, shoots flat, and stows just about anywhere. This version includes three 10-round magazines, and takedown for cleaning is quick and tool-free.
Key Specifications
- Manufacturer: Smith & Wesson
- Model: M&P FPC
- MPN: 14170
- UPC: 022188903782
- Caliber: 5.7x28mm
- Action: Semi-Auto, Blowback
- Barrel Length: 16.25 in, Threaded 1/2×28
- Overall Length (Unfolded): 30.375 in
- Folded Length: 16.375 in
- Capacity: 10+1
- Magazines Included: 3 x 10-Round
- Stock: Side-Folding Polymer with Dual Magazine Storage
- Handguard: M-LOK with Full-Length Picatinny Top Rail
- Sights: None, Optics Ready
- Safety: Cross-Bolt
- Finish/Color: Black
What’s Included
- Smith & Wesson M&P FPC 5.7x28mm carbine
- Three 10-round magazines
- Magazine loading tool
- Thread protector
- Owner's manual
Frequently Asked Questions
Does the M&P FPC 5.7 use the same magazines as the M&P 5.7 pistol?
Yes, it feeds from the same magazines as Smith & Wesson's M&P 5.7 pistol. This version ships with three 10-round mags, and the stock stores two spares with quick-release tabs so your reloads travel with the gun. If you already run the M&P 5.7 pistol, mag sharing between the two is a nice bonus.
Will my optic hold zero when the FPC is folded?
That's the whole point of the design. The FPC folds sideways at the hinge rather than over the top rail, so a red dot or scope mounted on the Picatinny rail stays undisturbed while folded. Unfold it, load, and you're back on target without re-zeroing.
Can I run a suppressor on the M&P FPC 5.7x28mm?
Yes. The 16.25 inch barrel comes threaded 1/2×28 with a thread protector installed, so it accepts common suppressors and muzzle devices. The 5.7 cartridge has a sharp bark unsuppressed, and reviewers have found it quiets down considerably with a can out of this rifle-length barrel.
Does the FPC 5.7 come with sights?
No iron sights are included. The full-length Picatinny top rail is set up for a red dot, low-power variable optic, or whatever glass suits how you plan to use it. The M-LOK slots on the handguard handle lights, hand stops, and other accessories.





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