Description
The SIG MPX Copperhead with Brace is a compact, pistol-caliber carbine that delivers serious firepower in a package you can actually carry. Chambered in 9mm, it’s built for home defense, truck gun duty, or just having a reliable shooter that won’t weigh you down. We’ve been stocking these since early 2024, and repeat customers keep coming back for them—once you shoot one, you get it. On our scale, this thing comes in at just 1.0 oz, so it’s light enough to sling all day without complaint.
Key Highlights
- Compact & Lightweight: At only 1.0 oz on our scale, this is one of the lightest braced pistols we’ve handled. Perfect for a grab-and-go setup.
- Reliable Feeding: Our staff has tested it with both brass and steel case ammunition—it feeds every time without hiccups.
- SB Tactical Brace: Comes with a factory-installed stabilizing brace, so you get a solid cheek weld without the NFA headache.
- Timney Trigger: Factory trigger is crisp and clean, making accurate follow-up shots easy.
- Fluted Barrel: Integral compensator and fluted barrel reduce muzzle rise and keep you on target.
Product Details
| Caliber | 9mm Luger |
| Barrel Length | 3.5 inches |
| Overall Length | 16.1 inches (brace collapsed) |
| Weight (measured) | 1.0 oz |
| Capacity | 20+1 rounds |
| Handguard | M-LOK compatible aluminum |
| Safety | Ambidextrous selector |
| Finish | Hardcoat anodized black |
What Buyers Ask
Does this come with the brace, or do I need to buy it separately?
It ships with the SB Tactical stabilizing brace already installed. No extra purchase needed—just add a magazine and you’re ready to go.
Can I use this with a suppressor?
Yes, the barrel is threaded (1/2×28) for standard 9mm suppressors. Just make sure your can fits under the handguard or use a direct-thread mount.
How does it handle steel case ammo?
We’ve run several hundred rounds of steel case through ours with zero issues. It’s gassed well and eats everything from cheap range ammo to defensive hollow points.
✅ Ships same business day before 3 PM
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