The M4E1 Pro Series Lower Build Kit is a premium foundation for your next AR-15 build, centered around the rugged M4E1 PRO lower receiver from Aero Precision. Finished in durable anodized black and marked with "Cal Multi" for maximum versatility, this kit is fully compatible with standard AR-15 components and magazines.
It comes equipped with Flat Dark Earth Magpul MOE carbine furniture for added comfort and control, plus a black ambidextrous 60/90-degree safety selector for smooth, adaptable operation. At the heart of this build is the Davidson Defense “Sundance” Ultra Match Drop-In Trigger, delivering a crisp 3.5 lb pull and available in eye-catching red or black. Proudly made in the USA, this lower build kit is engineered for builders who demand precision, performance, and reliability from the ground up.
Platform: AR-15
Color: Black
Finish: Anodized Black
Markings: "Cal Multi"
Made In: America
Compatibility: Works with standard AR-15 components and magazines
FFL Item: Yes
Lower Receiver Name: M4E1 PRO Lower Receiver
Safety Selector: Ambidextrous 60/90 degree
Safety Color: Black
Model: "Sundance" Ultra Match AR-15 Straight Drop-In Trigger
Trigger Pull Weight: 3.5 Lbs.
Trigger Style: Straight
Trigger Color: Red, Black
Country of Origin: USA
Rifle Stock: Magpul MOE FDE Carbine Stock
Handguard Color: Flat Dark Earth
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