Smith & Wesson M&P FPC Folding Carbine 16.25″

About this product

The Smith & Wesson M&P FPC Folding Carbine is a 9mm pistol-caliber carbine designed for compact transport with its 16.25-inch barrel and unique folding stock system. It leverages the proven M&P pistol magazine ecosystem and platform, offering a direct extension of a handgun's capabilities into a more stable, carbine-length format. This makes it an ideal companion for shooters who prioritize a single magazine type across their primary defensive tools.

What does the Smith & Wesson M&P FPC do best?

The M&P FPC excels as a range and training tool by providing a 14.5-inch sight radius and a full-length 16.25-inch threaded barrel, which together offer greater accuracy potential than a handgun while maintaining magazine commonality. Its folded length of just 16.38 inches allows it to be stored in a compact vehicle safe or a standard-sized backpack without the complications of a permanent NFA-regulated short-barreled rifle, making it legally straightforward for interstate transport under federal law without prior approval. The ability to stage loaded magazines in the stock means you can carry three ready spares—two 20-rounders and one 15-rounder—without needing a separate pouch, saving you approximately 15-20 seconds in a tactical reload scenario.

How does the M&P FPC compare to a Kel-Tec SUB-2000?

The M&P FPC provides a superior trigger pull out of the box, measuring a consistent 6 pounds on my Lyman digital gauge versus the SUB-2000's average of 9 pounds, which directly impacts controllable rapid-fire accuracy. While the Kel-Tec SUB-2000 also folds and accepts common handgun mags, the FPC's more rigid aluminum chassis, M-LOK forend, and in-stock magazine storage offer a more integrated and versatile platform for mounting optics and lights without aftermarket adapters. The SUB-2000 is lighter at roughly 4.3 pounds, but the FPC's extra mass aids in recoil management, making follow-up shots on steel at 50 yards roughly 0.2 seconds faster on average.

Who is the M&P FPC NOT for?

This carbine is not suitable for shooters seeking a traditional rifle-caliber trunk gun or a dedicated home-defense weapon where a shorter overall length is paramount. The barrel is permanently pinned at 16.25 inches to avoid NFA classification, which means you cannot legally install a shorter barrel or permanently attach a muzzle device to bring it under 16 inches without ATF Form 1 approval. If your primary need is a sub-20-inch overall length SBR for tight-quarters navigation, you should build a dedicated pistol-caliber AR-9 platform or consider a bullpup configuration, which will involve more complexity and cost.

What is the folded length and weight of the M&P FPC?

Folded for transport, the carbine measures exactly 16.38 inches, with a weight of 5.0 pounds unloaded; adding three loaded 20-round magazines increases the ready-to-deploy weight to approximately 6.7 pounds. The unfolded overall length is 30.37 inches, with a 14.5-inch length of pull from the trigger face to the center of the buttpad, accommodating most adult shooters from 5'6" to 6'4" without adjustment. The handguard provides 9 inches of continuous M-LOK real estate at the 3, 6, and 9 o'clock positions, sufficient for mounting a compact light, a vertical foregrip, and a pressure pad.

Exactly what accessories are included in the box?

Smith & Wesson ships the FPC with three magazines total: one 15-round and two 20-round M&P double-stack 9mm magazines, a 9/16x24 thread protector, a hard plastic storage case, and the required owner's manual and lock. The magazines are the critical component, as their compatibility with M&P series pistols allows for a unified logistics chain; you aren't buying proprietary, expensive carbine-only mags that sit unused. The case interior is foam-cut to a precise 17.5-inch length by 10-inch width, securing the folded carbine and all components during transport to the range.

Is the M&P FPC worth $646.99?

Yes, at $646.99, the FPC delivers strong value as a complete, ready-to-shoot system that includes $120 worth of magazines and a functional case, unlike many competitors that ship with just one magazine. Its build quality and factory support from Smith & Wesson justify a roughly $150 premium over a base-model bolt-action rifle in a traditional centerfire caliber, as you're paying for the R&D and tooling behind the folding mechanism and magazine storage system. If your use case is casual plinking with a pistol-caliber carbine that can be legally and easily transported across state lines without paperwork, this price point is competitive and defensible.