Stern Defense Magazine Adapter for M&P & Sig Sauer Magazines

Stern Defense Magazine Adapter for M&P & Sig Sauer Magazines
Product Specs:
Turn your mil-spec AR-15, M4, or M16 lower into a 9mm or .40 S&W powerhouse using your M&P, P320, or P250 magazines. The MAG-AD MP9/40 + P320 installs in seconds with no permanent modifications—perfect for both law enforcement professionals and dedicated civilian shooters.
Featuring true last-round hold open, this is one of the most trusted magazine conversion systems available today.

Made in the U.S.A.
Constructed from 6061 T6 aircraft grade aluminum.
4140 NiB coated feed ramp.
Hard coat anodized type 3.
Sturdy Construction.
Ergonomic mag release.
Works with all generations of M&P magazines.
Works with P320 and P250 magazines
Works with any mil spec ar15 lower receiver.
All gun components besides the Bolt and Barrel remain stock