SilencerCo Glock 17L 9mm Threaded Barrel 1/2x28 - AC861

SilencerCo AC861 Glock 17L Threaded Barrel 6.5 9MM Black Nitride Stainless Steel UPC 817272012033

Product Description

The SilencerCo Glock 17L Threaded Barrel (AC861) is a high-precision replacement barrel designed for suppressors and muzzle devices on long-slide Glock 9mm handguns. Precision-machined from 416R stainless steel, this 6.5-inch match-grade barrel provides exceptional corrosion resistance, longevity, and superior mechanical accuracy over standard factory barrels.

Featuring standard 1/2"-28 UNEF right-hand threads, the AC861 serves as an optimal host for 9mm suppressors, compensators, and muzzle brakes. The barrel exterior receives a durable, low-friction Black Nitride (QPQ) finish that significantly enhances surface hardness, wear resistance, and protection against harsh propellant gases, carbon buildup, and environmental elements.

Engineered to exact OEM drop-in tolerances for Glock 17L slide dimensions and locking block geometry, this barrel includes a custom-fitted thread protector to safeguard the precision crown and threads during unsuppressed firing. The chamber and feed ramp are polished to ensure smooth, reliable feeding across a wide range of 9mm ammunition, including subsonic heavy-grain loads and defensive jacketed hollow points (JHP).

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

Fitment Matrix: Direct drop-in fitment for Glock 17L (Long Slide) 9mm handguns across Gens 1 through 3. (Note: Verify locking block generation compatibility prior to installation; not compatible with standard Glock 17, 34, or Gen 5 locking geometry).

1. Field strip the handgun according to factory safety procedures, ensuring the chamber and magazine well are completely clear.
2. Remove the factory recoil spring assembly and factory barrel from the Glock 17L slide.
3. Insert the SilencerCo AC861 barrel into the slide, ensuring the locking lugs seat cleanly into the slide ejection port recess.
4. Reinstall the recoil spring assembly, reassemble the slide onto the frame, perform function checks, and apply high-temperature anti-seize lubricant to the barrel threads before mounting thread protectors or suppressors.

Key Features

• Match-Grade 416R Stainless Steel: Precision-machined stainless steel construction ensures tight chamber tolerances and long-term barrel life.
• Durable Black Nitride Finish: Surface-hardened QPQ finish resists friction wear, severe heat, and chemical corrosion.
• Standard 1/2"-28 Thread Pitch: Industry-standard thread pattern accommodates the majority of 9mm suppressors and muzzle compensators.
• Included Thread Protector: Protects muzzle threads and crown from impact damage during unsuppressed operation.
• Drop-In OEM Compatibility: Engineered to lock up seamlessly with factory Glock 17L Gens 1-3 slides and locking blocks.

Product Specifications

• Brand: SilencerCo
• Model/Series: Glock 17L Threaded Barrel
• MPN / SKU: AC861
• UPC: 817272012033
• Caliber: 9x19mm Parabellum / 9mm NATO
• Length: 6.5 Inches
• Thread Pitch: 1/2"-28 RH
• Platform Fitment: Glock 17L (Gens 1-3)
• Material: 416R Stainless Steel
• Finish/Color: Black Nitride (QPQ)
• Country of Origin: United States