SilencerCo® Delta 1/2"x28 Rimfire Rifle Thread Spacer – Black Oxide Steel – AC114
The SilencerCo® Delta Rimfire Rifle Thread Spacer (AC114) is a critical, high-precision adapter component designed to solve one of the most frustrating compatibility bottlenecks in the rimfire suppression community: over-length barrel threads. Historically, many rifle manufacturers and custom gunsmiths thread .22 LR barrels to standard AR-15 centerfire lengths (~0.600 inches). However, a significant majority of dedicated rimfire suppressors on the market are engineered specifically to register against a shallow rimfire-spec muzzle shoulder (~0.400 inches). Attempting to mount a rimfire silencer straight onto long centerfire threads leaves a dangerous gap, preventing the can from seating flush against the barrel shoulder and vastly increasing the risk of wobble, loosening, and catastrophic baffle strikes. The AC114 spacer (817272010497) cleanly bridges this physical gap, making your rimfire can safe, stable, and perfectly concentric.
Precision CNC-machined from exceptionally durable, high-grade structural steel bar stock, this compact adapter features an exact **0.25-inch thickness configuration with a native 1/2x28 TPI inner diameter pass-through**. Treated with a highly anti-corrosive, industrial black oxide finish, it resists violent thermal expansion, high-heat carbon scaling, and chemical bore solvents. To use it, simply slide the collar over your extended 1/2x28 threads before threading on your silencer; the spacer effortlessly absorbs the excess thread real estate, transforming your long AR-15 muzzle profile into a perfect, rimfire-spec seating deck. This allows favorite rimfire suppressors like the SilencerCo Sparrow 22, Switchback 22, or Warlock 22 to shoulder with absolute uniform torque, completely eliminating thread-bottoming issues and safeguarding your NFA investment.
Includes: (1) SilencerCo Delta 1/2"x28 Steel Rifle Thread Spacer (0.25" Thick) – Matte Black Oxide Finish.
Key Features
- Corrects Thread Seating Overlap: Absorbs roughly 0.25 inches of excess thread depth to convert long AR-15 muzzle lengths down to standard rimfire tolerances.
- Defends Against Baffle Strikes: Guarantees the suppressor shoulders perfectly flat and perpendicular to the bore axis, neutralizing rotational alignment wobble.
- Machined Structural Steel: Solid steel architecture ensures maximum compression resistance that will not distort or crush under heavy assembly torque.
- Industrial Black Oxide Finish: Clean, non-reflective matte coating shields the underlying steel structure against field humidity, organic carbon fouling, and chemical pitting.
- Broad SilencerCo Compatibility: Specifically optimized to secure the Sparrow 22, Switchback 22, Warlock 22, Spectre 22, and matching 1/2x28 rimfire cans.
- Turnkey Multi-Platform Solution: Perfect for running rimfire silencers on long-threaded dedicated .22 LR AR-15 uppers, Ruger 10/22s, or Smith & Wesson M&P 15-22 variants.
Product Specifications
- Brand: SilencerCo®
- Series: Delta Accessory Series
- SKU / MPN: AC114 (SCO-AC114)
- Thread Interface: 1/2"x28 TPI (Pass-Through)
- Thickness Dimensions: 0.250 Inches (~1/4" Thread Shifter)
- Calber Focus: .22 LR, .22 WMR, .17 HMR (Rimfire Optimized)
- Material: Heavy-Duty Hardened Steel Alloy
- Finish / Coating: Matte Black Oxide
- Outer Diameter: ~0.67 Inches (Blends flush with standard rimfire barrel profiles)
- Weight: 0.40 oz (0.02 lbs)
- UPC: 817272010497
