KNS Precision

KNS Precision AR/MCX Stock Adapter KIT with Flange

KNS Precision AR/MCX Stock Adapter Kit with Flange - Stock Adapter for AR-15 - view 1
Buy Now

KNS Precision

Overview

The KNS Precision AR/MCX Stock Adapter Kit with Flange is designed to provide a seamless interface for attaching a stock to your AR or MCX platform. It utilizes a Mil-Spec carbine buffer tube, ensuring compatibility with a wide range of stocks while maintaining the reliability needed for effective operation. This adapter is commonly found in builds featuring a mid-length gas system and chambered in 5.56 NATO, making it a practical choice for builders aiming for a balanced performance.

Specifications

MPNAR/MCX Adapter with Flange
AssemblyAdapter
Buffer Tube SpecMil-Spec
Buffer Tube TypeCarbine

Available Merchants(1)

Prices checked

Price Alert

Get an email if the price drops 10% or more.
Primary Arms logo
Primary Arms
Free shipping over $99
Shipping Speed
In Stock
$51.00
Buy Now

November 2026 so far on GunPartPicker

KNS Precision AR/MCX Stock Adapter KIT with Flange is the fourth most added stock adapter on GunPartPicker so far in November 2026, behind the Law Tactical AR Folding Stock Adapter Gen 3-M, with about 13% of all stock adapter parts added to builds. That's its 2nd straight month at #4. Builds with this stock adapter are mostly chambered in 5.56 NATO (69%, then .223 Wylde 10%), split between mid-length (52%) and carbine-length (30%) gas systems, and mostly AR-15 (87%, then AR-9 9%).

Today the one retailer we track has it in stock. Buying today, the lowest price is $51 at Primary Arms.

Trending stock adapter parts →

Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers

Frequently Built With

The part most often added in each category by the builds that include this one

Wilson Combat AR-15 Starburst Gunfighter Pistol Grip Black

Wilson Combat AR-15 Starburst Gunfighter Pistol Grip Black

Pistol Grip$25in 22% of them
Sharps Bros Showdown Stripped Lower Receiver - Black, Unique Design and High-Performance for Custom AR Builds - SBLR11

Sharps Bros Showdown Stripped Lower Receiver - Black, Unique Design and High-Performance for Custom AR Builds - SBLR11

Lower Receiver$285in 15% of them
Rise Armament Super Sporting AR15/10 Single Stage Trigger - Flat - Dtom Special Edition

Rise Armament Super Sporting AR15/10 Single Stage Trigger - Flat - Dtom Special Edition

Trigger$108in 15% of them
Strike Industries AR-15 Ambidextrous Safety Selector Switch - Red

Strike Industries AR-15 Ambidextrous Safety Selector Switch - Red

Safety$63in 13% of them
Rise Armament AR-15 Magazine Release Button - Rise Red

Rise Armament AR-15 Magazine Release Button - Rise Red

Magazine Release$8in 29% of them
Strike Industries Extended Bolt Catch

Strike Industries Extended Bolt Catch

Bolt Catch$11in 28% of them

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Platform

87.1%
AR-1587.1%
AR-98.6%
AR-104.3%

Caliber

69.4%
5.56 NATO69.4%
.223 Wylde10.2%
300 Blackout8.2%
.308 Win6.1%
9mm6.1%

Gas System

51.5%
Mid-Length51.5%
Carbine30.3%
Pistol9.1%
Rifle9.1%

Builds Featuring This Part

See all builds →

Builds in the community that include the KNS Precision AR/MCX Stock Adapter Kit with Flange

BuildPartsTotal
16" 5.56 build
16" 5.56		28$2048.89
aero precision 14.5" 5.56 build
aero precision 14.5" 5.56		27$1853.50
My 5.56 build build
My 5.56 build		29$4894.41

Review this product

Share your thoughts with other customers

Be the first to review

No reviews yet. Be the first to review this product!