KNS AR/MCX Stock Adapter WITH Flange
Not Yet Rated | Write the First Review SKU: 222-KNS-AR-MCX Adapter with Fl
UPC: 853906000000
MFG#: AR-MCX Adapter with Fl

KNS AR/MCX Stock Adapter WITH Flange – Flange-Equipped Picatinny Conversion Kit

Mount. Lock. Customize. The Flanged Adapter for Tactical Flexibility.

Take your rifle’s rear-end customization to the next level with the KNS AR/MCX Stock Adapter WITH Flange – the modular adapter that lets you mount Picatinny-style stocks or braces (like the SIG MPX folding stock) in place of the traditional buffer tube. Engineered for platforms that don’t require a buffer spring, this adapter gives you a clean, rock-solid interface while retaining standard AR15 takedown pin components—thanks to the integrated flange.

🔧 Key Features:

• Flanged Design – Allows the use of standard AR15 takedown pin, spring, and detent.

• Picatinny-Compatible – Mount MPX folding stocks, braces, or accessories with precision fit.

• Modular Two-Part Assembly – Includes adapter plug, rail section, hex bolt, and lock washer for a secure, stable installation.

• Compatible with Non-Buffer Builds – Ideal for firearms where the bolt carrier group doesn’t extend into the buffer tube.

• 🎯 Patent No. 10,598,450 – Authentic, legally protected innovation by KNS Precision.

🔥 Flat Dark Earth Edition – Limited Supply

Looking for a color-matched upgrade? The FDE (Flat Dark Earth) version of this adapter is a limited-edition run—get it while supplies last.

⚠️ Compatibility Warnings:

• ❌ Will not work with standard AR-15 rifles requiring a buffer spring assembly.

• 🚫 Not compatible with standard AR-15 lower + MCX upper setups.

• ✅ Best for platforms where the carrier does not protrude past the rear receiver ring.

• Lower receiver not included.

Tech Specs:

Why the Flange Matters:

Unlike the flange-free version, this model incorporates a rear flange, allowing builders to retain the takedown pin spring and detent on standard AR lowers. This makes it the go-to solution for those who want maximum compatibility with AR-style internals—without sacrificing modular stock attachment options.

Whether you're working on a PCC, MCX-style build, or bufferless short-barrel rifle, this adapter balances customization, integrity, and ease of installation.

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