Home » Shop » Sig Sauer MODX-45, 45ACP, 9.25″ Length, 1.35″ Diameter, Cerakote Finish, Gray
Home » Shop » Sig Sauer MODX-45, 45ACP, 9.25″ Length, 1.35″ Diameter, Cerakote Finish, Gray
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Sale!
$1,099.99Original price was: $1,099.99.$999.99Current price is: $999.99.
🔇 NFA made simple — we are an SOT/Class III dealer and walk you through the entire ATF process in-house. Questions? Call (817) 393-4000 before you buy.
Sig Sauer MODX-45 .45 ACP titanium suppressor, black, with mount — Sig’s modular titanium .45 suppressor for threaded .45 ACP pistols including 1911 and P220 platforms. $0 NFA stamp under OBBBA.
⚠ NFA ITEM — SUPPRESSOR
This is a federally regulated suppressor (silencer) 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 about two weeks or less for ATF approval. Western Sport handles all paperwork — call 817-393-4000.
The Sig MODX-45 brings titanium suppressor engineering to .45 ACP — the naturally subsonic pistol cartridge with the most suppressor-friendly ballistics in the American handgun market. .45 ACP is supersonic only in rare +P+ loadings; virtually all standard .45 ammunition is inherently subsonic, meaning no separate subsonic loadings are required to achieve the best suppressor performance. Titanium construction makes the MODX-45 among the lightest large-bore pistol suppressors available at this price point — critical for 1911s and P220 platforms where a heavy muzzle-mounted suppressor changes the pistol’s handling significantly. The MODX designation indicates Sig’s modular baffle configuration, giving the owner flexibility to configure for their preferred balance of sound reduction and length.
Sig MODX-45 Specifications
Spec
Detail
Caliber Rating
.45 ACP (inherently subsonic)
Construction
Titanium
Mount
Direct thread (mount included)
Finish
Black
Compatible Hosts
Threaded .45 ACP pistols (1911, Sig P220, HK USP, etc.)
NFA Class
Suppressor — Form 4, $0 stamp (OBBBA)
MSRP
$1,149.99
Why Buy From Western Sport?
Western Sport is a licensed FFL/SOT dealer in Roanoke, Texas, specializing in NFA firearms and suppressors since 2007. We stock Sig Sauer’s full suppressor lineup and guide every buyer through the Form 4 process start to finish. Call 817-393-4000 — our team can match you with the right Sig suppressor for your application.
FAQ — Sig MODX-45
Why is .45 ACP ideal for suppressor use?
.45 ACP has a muzzle velocity of roughly 850–950 fps with standard ball ammunition — well below the speed of sound (approximately 1,125 fps at sea level). Because the bullet travels subsonically by default, there’s no supersonic crack — one of the two main noise sources that suppressors cannot eliminate. The suppressor only has to address the muzzle blast, which it handles very effectively. This gives .45 ACP some of the best suppressed performance of any pistol caliber with standard ammunition, no specialty loads required.
What thread pitch does the MODX-45 use?
Standard .45 ACP pistol thread pitch is 0.578×28. Most 1911 threaded barrels use this pitch; the Sig P220 threaded model also uses this pitch. Confirm your specific barrel’s thread pitch before ordering. Call Western Sport at 817-393-4000 for confirmation.
Recent eForm 4 approvals have been coming back in about two weeks or less — see our NFA wait times guide for current figures.
First suppressor? Here is how buying one actually works.
Western Sport has been an SOT / Class III dealer in Roanoke, Texas since 2007. You buy the can here, we hold it in the safe, and we file the ATF paperwork for you — fingerprints and photo included. Your federal tax stamp is $0.
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