SIG SAUER MCX-SPEAR LT – SBR, IR FDE Cerakote, 300 BLK, 6.75" (WRMCX-300B-6B-LT-FDE-SBR)
The MCX-SPEAR LT brings SIG SAUER's lightened LT handguard, ambidextrous controls, and gas-piston architecture into a short-barreled rifle finished in Gen II IR FDE Cerakote. This listing is the MCX-SPEAR LT SBR in 300 BLK with a 6.75-inch barrel and (1) 30-round polymer magazine. SIG SAUER part WRMCX-300B-6B-LT-FDE-SBR, UPC 798681701056.
IR FDE Cerakote
SIG SAUER's IR-series SPEAR LT finish uses Cerakote Gen II IR / NiR FDE coating for reduced IR signature versus untreated finishes, with wear and corrosion resistance for hard use. This SKU is the Flat Dark Earth IR Cerakote configuration.
300 BLK, 6.75" Barrel
- Chambered in 300 BLK.
- 6.75-inch barrel on this SBR.
- Short-stroke gas piston operating system with an adjustable gas system.
- SIG QD suppressor-ready flash hider (Rocksett® SIG QD design on the SPEAR LT line).
LT Controls and Furniture
- Lightweight ergonomic M-LOK aluminum handguard.
- Fully ambidextrous controls.
- SIG flatblade match trigger (flat).
- Telescoping / folding stock.
- Interchangeable barrel capability on the LT platform.
- Magazines: (1) 30-round polymer, AR-15 pattern.
SIG SAUER MCX-SPEAR LT SBR Specifications
| Manufacturer | SIG SAUER |
| Model | MCX-SPEAR LT SBR, IR FDE |
| Part Number | WRMCX-300B-6B-LT-FDE-SBR |
| UPC | 798681701056 |
| Firearm Type | Short-barreled rifle (NFA) |
| Caliber | 300 BLK |
| Barrel Length | 6.75" |
| Action | Semi-automatic |
| Operating System | Short-stroke gas piston, adjustable |
| Trigger | SIG flatblade match, flat |
| Handguard | Lightweight ergonomic alloy M-LOK |
| Stock | Telescoping / folding |
| Controls | Fully ambidextrous |
| Muzzle | SIG QD suppressor-ready flash hider |
| Magazine Type | AR-15 |
| Magazines Included | (1) 30rd polymer |
| Finish | Gen II IR / NiR FDE Cerakote |
| Color | Flat Dark Earth (FDE) |
Frequently Asked Questions
What configuration is this?
This listing is the SIG SAUER MCX-SPEAR LT SBR in 300 BLK with a 6.75-inch barrel and IR FDE Cerakote — part WRMCX-300B-6B-LT-FDE-SBR.
Is this an NFA short-barreled rifle?
Yes. It is listed as a short-barreled rifle. All NFA rules apply.
What finish is on this SKU?
Gen II IR / NiR FDE Cerakote — Flat Dark Earth with reduced IR signature versus untreated finishes, per SIG SAUER's IR-series SPEAR LT description.
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-300B-6B-LT-FDE-SBR
Barcode:
798681701056
| Brand: Sig Sauer |
| Model: MCX, SIG MCX SPEAR |
| Caliber: .300 Blackout |
| Capacity: 30 |
| Firearm Action: Semi-auto |
| Color: FDE |
| Barrel Length: 6" - 16", 7" |
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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.