ProMag PM237B AR-15 9mm Quick Change Adapter

ProMag PM237B Quick Change Adapter Block

This innovative adapter block solves a common problem for 9mm AR-15 shooters: using standard 9mm Colt and SMG-pattern magazines in your rifle without permanent modifications.

Key Features

• Quick installation into AR-15/M16 lower receivers without removing the bolt stop roll pin
• Durable polymer construction with reinforced steel hardware
• Complete internal package includes roller, ejector, and bolt stop components
• Made in the USA with precision manufacturing
• Black finish for a clean, professional appearance

Design and Function

The adapter block is engineered to accept standard 9mm Colt and SMG-type magazines while maintaining reliable feeding and function with your 9mm upper receiver. The combination of high-strength polymer body and steel internals provides the durability you need for regular shooting.

Installation is straightforward—no gunsmithing required. The design allows you to swap between magazine types quickly, making it ideal for shooters who want flexibility without permanent modifications to their lower receiver.

Quality You Can Trust

ProMag's reputation for precision manufacturing and attention to detail means this adapter block will provide years of reliable service. Whether you're building a dedicated 9mm AR or adding versatility to an existing rifle, this quick-change adapter delivers the performance and reliability serious shooters demand.