![Aluminum Magazine Extension (+5) for FN Five-seveN® USG/MK2 Aluminum Magazine Extension (+5) for FN Five-seveN® USG/MK2](https://cdn11.bigcommerce.com/s-5o75fsu27v/images/stencil/500x659/products/639/1375/MK2-plus-5-extension__01435.1734387667.jpg?c=1)
Dorin Technologies
President is attentive to detail, card in every packet. Reached out via email, instagram, text, got a clear answer every time, he truly earned my Business. FN Factory mags with short lead times at less than the price of manufacture! I hardly leave reviews but Wow, FN Specialties / National Firearms Sales is at a level that deserves the respect.
— Raimundo R.We are proudly owned by National Firearm Sales, Inc., specializing in innovative custom builds and upgrades that push the boundaries of design and functionality while delivering unmatched performance, quality and aesthetics.
Most orders ship within one business day.Dorin Technologies
Dorin Technologies
Dorin Technologies
Dorin Technologies