Aim7 Welin-Lock Universal QD Barrel Adapter 1/2×28 (9mm Only)

Description

Aim7 Welin-Lock Universal QD Barrel Adapter 1/2×28 (9mm Only)

The Welin-Lock® system is a universal quick-detach (QD) piston interface developed by Aim7. It allows users to rapidly attach and remove suppressors using a standardized QD barrel adapter and piston setup—ideal for situations where speed and reliability are critical.

Key Features

  • 3 mounting positions spaced 120° apart for fast and secure installation

  • Forward taper that helps reduce suppressor baffle strikes

  • Coarse, top-cut threads for improved durability and ease of maintenance

  • Made from 17-4 stainless steel with a QPQ nitride finish for enhanced wear resistance

  • Installs using a ¾″ (19 mm) socket, tightened to ~20 ft-lbs


Thread Pitch Options

The Welin-Lock barrel adapters are available in various thread pitch options to match different firearm barrels, including:

  • ½×28 (standard)


Summary Table

FeatureDetails
Mount TypeQuick-Detach (QD) Welin-Lock™ Adapter
Material & FinishSUS303 COATED
Wrench Size & Torque¾″ socket (19 mm), ~20 ft-lbs
Mounting Interface3 positions, 120° apart
Forward TaperLocks piston, reduces baffle strikes
Thread Pitch Options½×28,

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