NBS Slick Side Billet Upper Receiver - Black

The NBS Slick Side Billet Upper Receiver is a quality, American made billet upper featuring a unique design that sets it apart from traditional forged upper receivers. Manufactured to exacting standards on five axis CNC machines from a solid block of aircraft grade aluminum, this stripped upper not only looks good... it is built to last. M4 Feedramps Compatible with mil-spec forged lower receivers and most billet lower receivers .250 takedown / pivot pin holes No forward assist Designed to be used with or without a port door / dust cover (will need to remove c-clip from dust cover pin before assembly) Weight: 7.1oz*Does not come with anti-rotation pin for use with NBS Free Float M-LOK Handguard and Dirty Bird Gen 2 Handguards. Anti-rotation pin can be found below:98381A470 - NBS/Dirty Bird Gen 2 Handguard Anti-Rotation Pin - AR15Discounts***UPPER MAY NOT BE COMPATIBLE WITH HANDGUARDS THAT FEATURE ANTI-ROTATION TABS.Made in the USABacked by the NBS Limited Lifetime Warranty