AIM7 ARCHER AA-12 WLN & Barrel Adapter Linear Comp 1/2×28 for 9MM

Description

AIM7 AA-12 WLN LOCK Linear Comp – 3-Inch Muzzle Device 1/2×28 9MM & AR9
“WILL NOT FUNCTION ON DELAYED BLOWBACK PISTOLS”

Delayed Blowback: The Key Difference

Delayed blowback systems include a mechanism that slows the slide/bolt’s rearward movement, giving time for the chamber pressure to drop to safe levels. This allows for:

• Use of higher-powered cartridges (like 9mm or even .45 ACP)

• Reduced felt recoil

• More reliable extraction and ejection

 

Aim7 Welin-Lock Rear Mount 1.125×28 (1 1/8×28) SUS303 STEEL

Aim7 Welin-Lock Rear Mount screws into the rear of the suppressor tube to allow for attachment via Welin-Lock. To mount your suppressor using Welin-Lock, you will need this Welin-Lock Rear Mount as well as a Welin-Lock barrel adapter (sold separately).

Features

• SUS303 Stainless Steel

• Compatible with Welin-Lock barrel adapters

• Cosmetic geometry for a firm grip

• Inside taper locks rear mount onto the barrel adapter

• Overall 1.193″

SUS303 (AISI 303 / EN 1.4305) Stainless Steel — Hardness

• Material Type: Austenitic stainless steel, free-machining grade (higher sulfur content for better machinability).

• Typical Hardness (Annealed / Solution Annealed condition):

  • ~160–190 HB (Brinell Hardness)

  • Equivalent to about 85 HRB (Rockwell B scale).

• After Cold Working / Work Hardening:

  • Can reach ~200–240 HB (approx. 95 HRB).

• Heat Treatment:

  • Not hardenable by heat treatment (like most austenitic stainless steels).

  • Only strengthened by cold working.

• 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

  Feature	Details
  Mount Type	Quick-Detach (QD) Welin-Lock™ Adapter
  Material & Finish	SUS303 COATED
  Wrench Size & Torque	¾″ socket (19 mm), ~20 ft-lbs
  Mounting Interface	3 positions, 120° apart
  Forward Taper	Locks piston, reduces baffle strikes
  Thread Pitch Options	½×28,