Stern Defense AR-15 Magazine Well Adapter M&P 9/40 and SIG Sauer P320/P250 Magazines CNC Machined Aircraft Grade Aluminum- Black

When the time comes to start a new build or just update an existing build consider using Stern Defense parts. Stern defense is committed to the gun lover who wishes to build or customize their AR-15 platform firearm. Like with all Stern Defense parts everything is machined to tight tolerances with an emphasis on quality as a top priority in the build shop. You really cant go wrong with Stern Defense.

Note:
These adapters require the use of a 9mm or 40S&W barrel, “depending on chosen caliber” and a bolt.

Specifications and Features:

• Ar-15 Magwell Adapter
• Smith & Wesson M&P 9/40 Magazine Compatible
• SIG Sauer P320/P250 Magazine Compatible
• Made in the USA
• Precision CNC Aircraft Grade Aluminum
• Last Round Hold Open Feature
• REQUIRES 5.4 OUNCE BUFFER OR HEAVIER WHEN USING A CARBINE SPRING
• Black

Fits:

• Standard Pattern AR-15 Lower Receivers
• Works with all generations of M&P magazines
• Works with P320 and P250 magazines