Product DescriptionThe Franklin Armory BFSIII M4 Built Lower Receiver is a ready-to-build lower assembly designed for AR-pattern M4 platforms. Built around Franklin Armory&';s Binary Firing System trigger, this lower features a forged 7075-T6 aluminum construction with a Type III hard coat anodized black finish for strength and durability. It comes equipped with an A2-style pistol grip, an M4-style reinforced six position collapsible stock, and an aluminum carbine-length receiver extension. Additional functional details include a specialized tension screw to help eliminate upper and lower receiver play, plus a stainless steel magazine with Marlube finish and anti-tilt follower.Product Highlights Forged 7075-T6 aluminum lower receiver assembly for durable AR/M4 platform performance Includes Franklin Armory BFSIII Binary Firing System trigger for enhanced shooting functionality Type III hard coat anodized black finish helps resist wear and corrosion Equipped with A2 pistol grip, reinforced six position M4 collapsible stock, and carbine-length receiver extension Includes 30 round 5.56 NATO magazine with stainless steel body, Marlube finish, and anti-tilt follower Specs Brand: Franklin Armory Model: M4 Built Lower Receiver Family: BFSIII Series MPN: 0020024BLK UPC: 818725013249 Action: Semi-Auto Caliber/Gauge: Multi Material: Forged 7075-T6 Aluminum Finish: Hardcoat Anodized Finish Type: Black Grip Type: A2 Stock/Grip Stock: Reinforced Six Position Collapsible M4 Design Receiver Extension: Aluminum Carbine Length Magazine Capacity: 30 Round 5.56 NATO Magazine Material: Stainless Steel Magazine Finish: Marlube Follower: Anti-Tilt Additional Feature: Specialized tension screw to reduce upper/lower play Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.