Sig Sauer MCX Spear SBR in 7.62×51 NATO (.308 Win), 13″ barrel, Coyote Tan — gas piston, QD flash hider for suppressor-ready deployment, folding Magpul SL-M stock, 20-round magazine. $0 NFA stamp under OBBBA.
⚠ NFA ITEM — SHORT BARRELED RIFLE
This is a federally regulated Short Barreled Rifle (SBR) under the National Firearms Act. Purchase requires a BATFE Form 4 transfer, background check, and $200 NFA tax stamp — now $0 under the One Big Beautiful Bill Act (OBBBA). Buyer must be 21+, a US citizen, reside in an NFA-legal state, and have no disqualifying criminal history. Allow 30–90 days for ATF approval. Western Sport handles all paperwork — call 817-393-4000.
The Sig Sauer MCX Spear SBR in 7.62×51 NATO is the proven battle-rifle caliber version of Sig’s NGSW platform — all the engineering of the MCX Spear in a cartridge with decades of established performance data, widely available ammunition, and proven terminal effectiveness. Where the 6.8×51 version pushes the performance envelope, the 7.62×51 Spear SBR delivers that same world-class MCX platform in a caliber that’s universally understood: .308 Winchester. The 13-inch barrel with gas piston produces a compact package that generates genuine .308 ballistics with the folding stock, QD suppressor mounting, and ambidextrous controls that define the MCX platform.
Specifications
Spec
Detail
Caliber
7.62×51 NATO (.308 Winchester)
Barrel
13″ cold hammer forged, threaded, QD flash hider
Operating System
Short-stroke gas piston, 2-position adjustable regulator
Stock
Magpul Push-Button Folding SL-M, Coyote Tan
Magazine
20-round steel
Finish
Coyote Tan
NFA Class
SBR — Form 4, $0 stamp (OBBBA)
MSRP
$3,999.99
Why Buy From Western Sport?
Western Sport is a licensed FFL/SOT dealer in Roanoke, Texas with over 17 years of NFA experience. We handle every aspect of the Form 4 transfer: paperwork, fingerprints, photos, ATF submission, and approval follow-up. We stock Sig Sauer NFA firearms and suppressors because they represent the best engineering in the industry. Questions before you buy? Call 817-393-4000. We ship to your local FFL anywhere in the continental US.
FAQ — Sig MCX Spear 7.62×51 SBR
MCX Spear 6.8×51 vs. 7.62×51 — which should I choose?
7.62×51 offers widely available, less expensive ammunition and decades of established performance data. 6.8×51 offers a newer, more powerful cartridge with higher energy and flatter trajectory — but at higher ammunition cost and lower availability. For general .308 applications (hunting, long-range SBR use, suppressed precision), the 7.62×51 Spear is the practical choice. For maximum terminal performance and NGSW-aligned capability, choose 6.8×51.
What suppressors work with the MCX Spear 7.62×51?
Sig’s SLX 762 QD suppressor is the ideal pairing — it mates to the factory QD flash hider. The SLH 762 TI is Sig’s titanium option for lower weight. Third-party suppressors rated for 7.62 NATO with compatible QD mounts also work. Call Western Sport at 817-393-4000 for current suppressor pairings.
What is the NFA stamp cost?
$0 under the One Big Beautiful Bill Act (OBBBA). Form 4 process still applies — 30–90 day ATF wait.
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