Description
The MCX-SPEAR LT in 5.56 is a purpose-built fighting pistol for the serious user who demands modularity and reliability. Built on Sig Sauer’s refined LT platform, this 11.5-inch model offers a compact, gas-piston-driven package that runs cleaner and cooler than most direct-impingement ARs. It’s the kind of tool you grab when you need absolute confidence in a compact format.
Key Features
- 11.5″ Cold Hammer-Forged Barrel: The shorter barrel keeps things maneuverable without sacrificing too much velocity. The chrome-lined bore and Sig’s proprietary gas piston system mean this thing will run dirty, hot, or dry.
- Full-Ambidextrous Controls: The non-reciprocating charging handle, safety selector, and bolt release are mirrored on both sides. After decades of testing different layouts, this one just makes sense for efficient manipulation.
- Two-Position Folding/Telescoping Stock: The included SIG minimalist stock folds completely flat against the receiver, making it incredibly easy to store or transport in a compact bag or case.
- M-LOK Handguard: The 10-inch handguard provides ample real estate for lights, lasers, and grips, and it stays surprisingly cool to the touch. I’ve run thousands of rounds through similar setups and the heat management is noticeable.
- Enhanced Trigger & Cerakote Finish: It comes with a much-improved single-stage trigger over older MCX models, breaking around 5.5 lbs, and the entire firearm is finished in a durable Coyote Tan Cerakote.
| Caliber | 5.56 NATO |
|---|---|
| Barrel Length | 11.5 in |
| Overall Length (Stock Extended) | 28.75 in |
| Overall Length (Stock Folded) | 20.5 in |
| Weight (Unloaded) | 6.25 lbs |
| Action | Short-Stroke Gas Piston |
| Trigger | Single-Stage |
| Finish | Coyote Tan Cerakote |
| Muzzle Device | 3-Prong Flash Hider |
Honest Assessment
Pros: The piston system is incredibly reliable with minimal gas to the face, a huge plus for suppressed shooting. The folding stock is a game-changer for storage and quick deployment. The fit, finish, and out-of-the-box trigger are excellent for a factory gun.
Cons: The price point is steep, putting it in a niche category. It’s also heavier than a comparable DI AR-15 by nearly a pound, which you’ll feel on long carries. While the handguard is great, some proprietary parts mean you can’t just slap any AR accessory on it.
Who Should Buy This
This is for the shooter who uses their firearm hard and values a bombproof, short-stroke piston system above all else. It’s ideal as a vehicle or backpack gun where the folding stock is a critical feature, or for anyone who plans to run a suppressor frequently and wants a cleaner, more adjustable system. It’s not a plinker’s first pistol; it’s a professional-grade tool.
Frequently Asked Questions
Does this use standard AR-15 magazines?
Yes, it accepts all standard AR-15 pattern magazines (PMAGs, USGI, etc.) without issue.
Can I attach a vertical foregrip to this pistol?
With the 11.5-inch barrel, attaching a vertical foregrip would classify this as an Any Other Weapon (AOW) under the NFA without proper registration. An angled foregrip is the common choice for a pistol configuration.
Is the gas system adjustable?
Yes. The SPEAR LT features a user-adjustable gas block with settings for normal, suppressed, and an off position. I’ve seen firsthand how handy this is when switching between ammo types or adding a can.
What optics mount does it use?
The upper receiver has a full-length, continuous Picatinny rail. It does not include an optic, so you’ll need to mount your own red dot, prism scope, or LPVO using the appropriate rings or mount.
Amanda C. (verified owner) –
Everything arrived in perfect condition.
Wayne R. (verified owner) –
Solid product. Already recommended to 2 friends.
Diana L. (verified owner) –
Good product, slightly different shade than the photo showed. Still works perfectly though.
Chris P. (verified owner) –
Bought this as part of a larger build project. Houston Sporting Goods had the best price by a decent margin and shipping was fast. The MCX-SPEAR LT IR 5.56 11.5″ PISTOL itself is well-made — Tight tolerances. Overall this is exactly what I needed. Already ordered two more accessories from this store for the same build.
Brandon W. (verified owner) –
Second time ordering from here. Always reliable.
Tara W. (verified owner) –
I was skeptical about ordering online but this is legit. Good product, fast shipping, discreet packaging. Will order again.