Cross Machine Tool Billet Left Hand Stripped AR-15 Upper Receiver

The Cross Machine Tool Billet Left Hand Stripped AR-15 Upper Receiver gives left-handed shooters a dedicated platform instead of a right-handed layout adapted after the fact. Built for shooters tired of hot gas and ejected brass in their face, this receiver flips ejection to the left side.

Features:

• Machined from 7075-T6 billet aluminum
• Class III Type II hardcoat anodized finish
• Engraved T-marked flat top
• M4 feed ramps
• Compatible with mil-spec parts except the BCG
• Requires a Stag Arms left-hand BCG or equivalent
• Increased wall thickness for improved rigidity
• Lifetime warranty against manufacturing defects

Machined from a billet of 7075-T6 aluminum, this receiver holds more precise dimensions and thicker walls than a cast or forged equivalent, and by design it does not accept a dust cover. It shares the same specs as Cross Machine Tool's standard upper but is flipped for left-side ejection, so it works with mil-spec lowers, upper parts, and charging handles.

It requires a Stag Arms left-hand bolt carrier group or a comparable BCG with matching dimensions, since a standard right-hand BCG will not function correctly in this configuration. The flat top rail carries engraved T-marks for consistent optic placement across removal and reinstallation.

Cross Machine Tool Co. is a veteran-owned manufacturer that uses modern machining technology to build AR-15 components engineered to exceed military standards.