**Product in picture is California compliant as is and does not require CA compliant parts or modification. CA Compliant parts are buyers responsibility when built into rifle.**
Click Other details to read more from the Manufacturer.
The M4E1 Lower Receiver delivers billet aesthetics in a forged package. This custom designed enhanced forging is machined from 7075-T6 Aluminum and compatible with all mil-spec AR15 parts. Aside from the visual upgrades this custom engineered design provides that challenge much more expensive billet options, we have added several functional features to the lower receiver to simplify the assembly process for the at home builder.
