LBE Unlimited AR75RBK Ready Build Kit | .223/5.56 | 7.5″

The LBE Unlimited AR75RBK Ready Build Kit assembles a compact AR-15 upper with a 7.5″ cold hammer forged barrel finished in Melonite. This kit ships with a complete upper receiver and the key components needed for an AR pistol or SBR-configured upper. Components emphasize durability and serviceable finishes for frequent range use and close-quarters training scenarios.

Product Specifications

• The manufacturer is LBE Unlimited.
• The model is listed as Ready Build Kit (AR75RBK).
• The caliber is .223 Rem/5.56 NATO.
• The barrel measures 7.5″ Cold Hammer Forged (CHF) and is treated with a Melonite finish.
• The finish is specified as Melonite.
• The kit color is Black.
• The product type is a Kit intended to assemble a complete upper.
• The fitment is for AR-15 platforms.
• The subcategory is Complete Upper Receivers.
• The upper includes a receiver with dust cover and forward assist installed.
• The bolt carrier group included is a NiB M16-style BCG.
• The gas system uses a pistol-length gas tube pinned into a low-profile gas block.
• The kit includes a standard charging handle.
• The muzzle device provided is an A2 birdcage flash hider with crush washer.
• The UPC is 706612408127.

This build kit gathers durable, serviceable components to save assembly time while leaving room for user customization. It is appropriate for compact AR pistol or SBR projects and for shooters who prioritize a short-barrel, pistol-length-gas configuration for close-quarters training and range work. The components and finishes are selected to provide consistent service life under routine use.