The Seekins Precision SP223 Gen2 Billet Lower Receiver is a mil-spec compatible AR-15 lower machined from 7075-T6 aluminum billet (Seekins part no. 11000008F). Seekins Precision gives it an ambidextrous bolt catch and release, screw-in dowel pins in place of roll pins, and an enhanced assembly design for a cleaner build. A nylon-tipped upper receiver tension screw keeps the upper snug, and a Type III hardcoat anodized finish protects the surface. It weighs 10.9 ounces and requires an FFL transfer.

Key Specifications

• The platform is AR-15, mil-spec compatible, so standard lower parts kits and uppers fit.
• The material is 7075-T6 aluminum billet, a strong alloy that is machined from solid stock.
• The finish is Type III hardcoat anodize, a hard surface treatment that resists wear.
• The weight is 10.9 ounces, light enough to keep a build trim.
• The bolt catch and release is ambidextrous, which makes the rifle easier to operate from either side.
• The receiver uses screw-in dowel pins with no roll pins, which removes a common source of assembly trouble.
• The upper receiver tension screw is nylon tipped, which snugs the upper to the lower.

Frequently Asked Questions

Does this lower take standard AR-15 parts? Yes. Seekins lists the SP223 Gen2 as AR-15 mil-spec compatible.

Does it have an ambidextrous bolt release? Yes. The SP223 Gen2 uses an ambidextrous bolt catch and release.

Does it use roll pins? No. The lower uses screw-in dowel pins in place of roll pins.

Buy the Seekins Precision SP223 Gen2 Billet Lower Receiver, AR-15

A billet lower is the foundation of a custom AR build, and the hardcoat finish here is made to hold up to heavy use. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more AR-15 lowers while you are here.