SilencerCo Sig P320 Full Size 9mm 5.46" Threaded Barrel 1/2x28 Nitride - AC2413

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SilencerCo Sig Sauer P320 Full Size 9mm Luger 5 46 Inch Threaded Barrel 1 2x28 Black Nitride AC2413 UPC 816413024058

Product Description

The SilencerCo® SIG Sauer P320 Full Size 9mm Threaded Barrel (SKU: AC2413 / UPC: 816413024058) provides a direct, precision-engineered suppressor and compensator interface for full-size SIG P320 and M17 platforms. Designed by the industry leader in sound suppression systems, this drop-in barrel converts standard duty-length P320 pistols into exceptionally quiet, flat-shooting host weapons without requiring hand-fitting or gunsmith alteration. The 5.46-inch overall length establishes proper slide clearance for direct-thread muzzle brakes, pistol compensators, and piston-driven suppressors such as the SilencerCo Omega 9K, Osprey 9, and Spectre 9.

Each barrel is precision CNC-machined from ordnance-grade 416R stainless steel, an alloy specifically formulated for precision firearm barrels due to its stress-relieved microstructure and dimensional stability under rapid thermal cycling. SilencerCo subjects every barrel to an advanced QPQ Black Nitride salt-bath treatment, deeply diffusing nitrogen into the surface steel. This process hardens the exterior and bore against throat erosion, significantly reduces friction coefficients, and creates an impermeable barrier against corrosive blowback carbon, unburnt powder fouling, and wet-suppressor shooting conditions.

The bore features a precision button-rifled 1:10-inch right-hand twist rate, engineered to stabilize standard supersonic training ammunition as well as heavy 147-grain, 150-grain, and 158-grain subsonic rounds essential for maximum sound suppression. Factory threads are cut to class-leading 1/2x28 UNEF-2A specifications to ensure exact concentricity with the bore axis, actively preventing baffle and end-cap strikes. Each barrel ships with a precision-machined, knurled thread protector fitted with an internal O-ring to prevent unthreading during unsuppressed firing strings.

*Armorer Bench Notes & Real-World Staging Guidance:*

Fitment Matrix: Direct drop-in fit for SIG Sauer P320 Full Size and standard military-pattern M17 slides designed for standard 4.7-inch factory barrels. CRITICAL: Will NOT fit P320 Carry / Compact (3.9-inch barrel), Subcompact (3.6-inch barrel), XCompact, P320 XFIVE Legion (which requires a larger-diameter bull barrel contour), or M18 variants. When mounting a suppressor, always verify that your booster assembly / Nielsen device uses a 1/2x28 piston and is appropriately lubricated with high-temperature grease on the piston splines. Hand-tighten suppressors directly against the barrel shoulder and visually inspect bore concentricity before live-fire.

1. Ensure the host firearm is completely clear, magazine removed, and chamber visually and physically verified empty.
2. Lock the slide to the rear, rotate the P320 takedown lever downward 90 degrees, and ease the slide assembly forward off the frame rails.
3. Compress and remove the factory recoil spring assembly, then lift and draw the factory non-threaded barrel rearward and out of the slide.
4. Insert the SilencerCo AC2413 barrel into the slide, ensuring the hood fully interfaces with the slide ejection port and the feed ramp sits cleanly in the lower relief, then reinstall the recoil spring assembly.
5. Reassemble the slide onto the frame, reset the takedown lever, cycle the action manually to confirm positive lockup and link-down clearance, and install either the thread protector (torqued hand-tight) or your checked-concentric suppressor/compensator.

Key Features

• Ordnance-Grade 416R Stainless Steel: Machined from certified barrel-grade stainless steel to deliver match-grade accuracy and withstand high-pressure suppressed gas loads.
• Salt-Bath Black Nitride Finish: Molecular QPQ nitrocarburizing protects exterior surfaces and bore rifling from abrasive wear, heat erosion, and corrosive residue.
• 1/2x28 Precision Thread Pitch: Standardized American 9mm muzzle threads cut concentric to the bore centerline to eliminate baffle strikes on suppressors and compensators.
• 1:10" Right-Hand Twist Rate: Perfectly stabilized for 115gr, 124gr, and heavy 147gr to 158gr subsonic rounds for optimal suppression and tight shot groups.
• Direct Drop-In Integration: Factory-spec locking lugs and barrel hood tolerances ensure smooth feeding and reliable lockup without fitting.
• Knurled Thread Protector Included: Precision steel thread cap safeguards muzzle threads from impact and debris during unsuppressed duty or range use.

Product Specifications

• Brand: SilencerCo®
• Model/Series: SIG Sauer P320 Full Size Threaded Barrel
• MPN / SKU: AC2413
• UPC: 816413024058
• Caliber: 9mm Luger (9x19mm Parabellum)
• Barrel Length: 5.46 Inches
• Thread Pitch: 1/2"x28 UNEF
• Material: 416R Stainless Steel
• Finish: QPQ Black Nitride
• Twist Rate: 1:10" RH
• Platform Compatibility: SIG Sauer P320 Full Size (4.7" slide models), M17
• Country of Origin: United States