SIG SAUER MCX-SPEAR LT – SBR, IR FDE Cerakote, 5.56 NATO, 9" (WRMCX-556N-9B-LT-FDE-SBR)
The MCX-SPEAR LT is SIG SAUER's lightened LT evolution of the MCX: ergonomic M-LOK handguard, fully ambidextrous controls, flatblade match trigger, and a gas-piston system with suppressor-ready muzzle hardware — finished here in IR FDE Cerakote. This listing is the MCX-SPEAR LT SBR in 5.56 NATO with a 9-inch barrel and (1) 30-round polymer magazine. SIG SAUER part WRMCX-556N-9B-LT-FDE-SBR, UPC 798681701155.
IR FDE Cerakote
This SKU carries IR Cerakote in Flat Dark Earth — the IR-series FDE treatment SIG SAUER describes as Gen II IR / NiR coating for reduced IR signature and durable surface protection on SPEAR LT IR rifles.
5.56 NATO, 9" Barrel
- Chambered in 5.56 NATO.
- 9-inch barrel on this SBR.
- Carbon steel barrel material; 1:7 twist; muzzle threads 1/2 in - 28.
- Gas piston operating system with adjustable gas.
- SIG QD suppressor-ready flash hider (Rocksett® SIG QD).
LT Controls and Furniture
- Lightweight ergonomic alloy M-LOK handguard.
- Fully ambidextrous controls.
- SIG flatblade match trigger (flat).
- Telescoping / folding stock.
- Forward assist.
- Interchangeable barrel capability on the LT platform.
- Magazines: (1) 30-round polymer, AR-15 pattern.
Size and Weight
Dealer-published dimensions for this 9-inch 5.56 SPEAR LT SBR configuration: overall length 27.8 in (705 mm), overall width 7.5 in (190.5 mm), weight 6.4 lb (2.9 kg).
SIG SAUER MCX-SPEAR LT SBR Specifications
| Manufacturer | SIG SAUER |
| Model | MCX-SPEAR LT SBR, IR FDE |
| Part Number | WRMCX-556N-9B-LT-FDE-SBR |
| UPC | 798681701155 |
| Firearm Type | Short-barreled rifle (NFA) |
| Caliber | 5.56 NATO |
| Barrel Length | 9 in (228.6 mm) |
| Barrel Material | Carbon steel |
| Twist Rate | 1:7 |
| Muzzle Threads | 1/2 in - 28 |
| Action | Semi-automatic |
| Operating System | Gas piston, adjustable |
| Trigger | SIG flatblade match, flat |
| Handguard | Lightweight ergonomic alloy M-LOK |
| Stock | Telescoping / folding |
| Controls | Fully ambidextrous |
| Forward Assist | Yes |
| Muzzle | SIG QD suppressor-ready flash hider |
| Magazine Type | AR-15 |
| Magazines Included | (1) 30rd polymer |
| Overall Length | 27.8 in (705 mm) |
| Overall Width | 7.5 in (190.5 mm) |
| Weight | 6.4 lb (2.9 kg) |
| Finish | IR Cerakote, Flat Dark Earth (FDE) |
Frequently Asked Questions
What configuration is this?
This listing is the SIG SAUER MCX-SPEAR LT SBR in 5.56 NATO with a 9-inch barrel and IR FDE Cerakote — part WRMCX-556N-9B-LT-FDE-SBR.
Is this an NFA short-barreled rifle?
Yes. It is listed as a short-barreled rifle. All NFA rules apply.
What twist and thread pitch?
Dealer specifications for this 9-inch 5.56 configuration list 1:7 twist and 1/2 in - 28 muzzle threads.
How many magazines are included?
One 30-round polymer magazine.
Is it suppressor-ready?
Yes. The SPEAR LT line uses a SIG QD suppressor-ready flash hider.
Internal Reference:
WRMCX-556N-9B-LT-FDE-SBR
Barcode:
798681701155
| Brand: Sig Sauer |
| Model: MCX, SIG MCX SPEAR |
| Caliber: 5.56mm |
| Capacity: 30 |
| Firearm Action: Semi-auto |
| Color: FDE |
| Barrel Length: 6" - 16", 9" |
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This product may have shipping restrictions in some states.
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This item cannot be shipped to the following locations due to legal or carrier restrictions:
Restriction Details
This product cannot be sold or shipped to your location due to magazine capacity restrictions. Magazine capacity cannot exceed 10rd. If you believe this to be incorrect or if you're exempt from the restriction, please contact us at 636-791-1655.
Affected States/Territories (10):
Restriction Details
Colorado prohibits magazines with a capacity exceeding 15rd. If you believe this is in error or if you are exempt from the restriction, please contact us at 636-791-1655.
Affected States/Territories (1):
Restriction Details
Vermont restricts rifle magazine capacity to 10rd. This exceeds the state's restricted capacity. If you believe this is in error or if you are exempt from the restriction, please contact us at 636-791-1655.