Stern Defense SD MOD 4 9MM UPPER RECEIVER 16.1IN M-LOK COMPLETE BLACK 015SD15INCHMOD4

The Stern Defense SD Mod 4 9mm Upper Receiver is a complete, ready to go, upper receiver solution for those looking to spend less time building and more time shooting.

The 16.1 inch, 1-10 twist, Melonited barrel, is free float in a 12in M-LOK handguard attached to a 7075-T6 forged aluminum receiver.

• 16.1in barrel
• 15in M-LOK Free Float handguard
• Complete assembly with 9mm bolt and charging handle
• ½-36 muzzle thread pitch
• SD BU9 9mm Bolt
• Cartridge: 9mm Nato

Included in the upper receiver is charging handle and the Stern Defense 9mm Bolt which is compatible with both Glock and Colt SMG magazines, has a Melonite finish, and is works in conjunction with the Law Tactical Folding Adapter. The Stern Defense SD Mod 4 9mm Upper Receiver is made in the U.S.A.