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For years, folks asked SIG to chamber the MCX in 7.62×39, and this rifle is the answer done right. The SPEAR LT IR runs the classic round through a short-stroke gas piston system that was built from the ground up to handle it, including a redesigned latch system engineered to cycle everything from premium brass to budget steel-case ammo without complaint. The 16 inch cold hammer forged barrel spins a 1:9.5 twist that keeps those heavier 7.62 bullets stable, and the 5/8×24 threaded muzzle wears SIG's suppressor-ready QD flash hider so you can go quiet without swapping hardware.
The IR in the name is not just marketing. This model wears SIG's Gen II NIR Flat Dark Earth Cerakote, a coating designed to reduce your signature under night vision and thermal while also shrugging off wear and corrosion better than standard finishes. Pair that with the Tele-fold stock, which both telescopes for length of pull and folds flat against the receiver, and you get a rifle that shrinks from 35.25 inches down to 26.25 inches for transport. At 7.6 pounds with the magazine, it carries easier than most rifles in this caliber.
Every control on this rifle is fully ambidextrous, including the bolt catch and release, so lefties get the same fast manipulation as everyone else. The flat blade match trigger gives a clean, consistent press that punches well above what you would expect from a duty-grade rifle, and the lightened aluminum M-LOK handguard leaves plenty of real estate for lights, lasers, and grips. Up top, a full-length Picatinny rail ships clean and optics ready, so you can mount the red dot or LPVO of your choice. It ships with one 28-round steel magazine and is backed by SIG's Infinite Guarantee, no receipts or warranty cards needed. If you have been waiting for a 7.62×39 rifle that feels like a modern fighting gun instead of a compromise, this is it.
Yes, that was a priority in the design. SIG developed a new latch system specifically so the 7.62×39 MCX-SPEAR LT could digest the wide range of ammo this caliber is known for, including steel-case imports. The short-stroke gas piston system also runs cleaner than direct impingement, which helps with dirty ammo over long range sessions.
The IR model wears SIG's Gen II NIR Flat Dark Earth Cerakote instead of the standard coyote anodized finish. That coating reduces your visible signature under night vision and thermal devices, and it adds a tougher layer of wear and corrosion resistance. It also comes with the folding and telescoping Tele-fold stock.
It is. The 16 inch barrel is threaded 5/8×24 and comes with SIG's QD flash hider installed, which serves as a quick-detach mount for compatible SIG suppressors. If you run a different can, you can thread it directly onto the barrel after removing the flash hider.
No, it ships optics ready with a full-length Picatinny top rail and no iron sights. That gives you a clean slate to mount a red dot, LPVO, or backup irons however you like. The aluminum M-LOK handguard adds plenty of room for lights and other accessories too.
| UPC | 798681699735 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | RMCX762R16BIR |
| Action | |
| ATF Type | MODERN SPORTING RIFLE |
| Barrel Length | 16" |
| Caliber/Gauge | 7.62 x 39mm |
| Capacity | 28 + 1 |
| Color | Flat Dark Earth |
| Length | 46.1500 |
| Model | |
| Number of Magazines | 1 28 rd. |
| Package Height | 4.0 |
| Package Width | 11.3 |
| Product Type | AR |
| Shipping Weight | 10.15 |
| Sights | No |
| State Restriction (CA) | NO DIRECT SHIP TO CALIFORNIA |
| State Restriction (RI) | NO DIRECT SHIP TO RHODE ISLAND |
| State Restriction (WA) | NO DIRECT SHIP TO WASHINGTON |
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