NBS Slick Side Billet Upper Receiver & M-LOK Handguard Combo 4" AR-15

This NBS Slick Side Billet Upper Receiver and M-LOK Handguard combo was designed and machined to match up beautifully together. It packs a multitude of great features into a sleek, rigid and durable package. To top it off, this American made combo is backed by the NBS Limited Lifetime Warranty. This combo also includes a stainless steel dowel pin that acts as the anti-rotation interface between the upper receiver and handguard. Adding structural stability while maintaining a sleek profile and minimalist look. NBS Slick Side Billet Upper Receiver 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 6061 aircraft grade aluminum. 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 e-clip from dust cover pin before assembly) Weight: 7.1oz NBS Free Float M-LOK Handguard The NBS Free Float M-LOK Handguard is a no-nonsense American made M-LOK compatible rail system designed for versatility and simplicity. It features a monolithic top picatinny rail and the remaining 7 sides all feature M-LOK attachment slots. Precision machined from 6061-T6 aluminum extrusions then type 3 hard coat anodized, you can be sure that this handguard will withstand an incredible amount of abuse. Its slim profile feels great in the hand yet with a 1.35" inside diameter it can accommodate any true low profile gas block and has enough clearance to recess some muzzle devices such as flash cans and linear compensators. It is a true do-anything rail system and the cost-value ratio makes it very hard to pass up. Available in 7", 12" and 15" lengths 6061-T6 Aluminium Type 3 Hard Coat Anodizing 1.35" ID Installed Weight: 7" - 7.3oz 12" - 10.9oz 15" - 12.9oz