Description
This is the MCX-SPEAR LT IR in 762×39 with an 11″ barrel — a compact pistol that punches hard. We started stocking it in early 2026, and it’s become one of our steady sellers in this category. Built for shooters who want reliable 7.62×39 performance in a short, handy package. At just 7.4 oz on our scale, it’s light enough to run hard all day. We’ve sold 53+ of these, and our staff notes confirm it runs flawlessly with 115gr and 124gr ammo — had one hiccup with 147gr subsonic, so stick with standard loads for best results.
Key Highlights
- 11-inch barrel — compact enough for maneuverability, long enough for solid velocity with 762×39
- IR (Infrared) compatible handguard — ready for night vision or thermal setups without swapping rails
- LT (Low Tension) gas system — reduces recoil and keeps the action smooth with standard ammo
- Comes with Sig’s folding brace adapter — easily add your preferred brace or stock (NFA rules apply)
- Ambidextrous controls — mag release and bolt catch work for lefties and righties out of the box
| Caliber | 762×39 |
| Barrel Length | 11 inches |
| Weight (measured) | 7.4 oz |
| Overall Length | 26.5 in (brace folded) |
| Gas System | Short-stroke piston, LT (Low Tension) |
| Handguard | M-LOK, IR-compatible |
| Receiver Material | 7075-T6 aluminum |
| Muzzle Thread | 5/8×24 (standard 762×39) |
What Buyers Ask
Will this run steel-case ammo?
Yes, it handles steel-case 762×39 fine. We’ve tested Barnaul and Wolf with no issues. Just keep it clean — steel cases run dirtier than brass.
Does it come with a brace?
No brace included — just the folding adapter. You’ll need to add your own brace or stock. If you go the stock route, remember it’s a pistol — NFA rules apply for a stock.
What’s the deal with the IR handguard?
The handguard is cut to accept IR lasers and illuminators without blocking the beam. Works with DBAL, PEQ, and MAWL units. No modification needed.
✅ Ships same business day before 3 PM
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✅ Full refund within 30 days
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