Discover the precision and versatility of the Bad Attitude Department AR-15 Ambi Widemouth Lower Receiver - MK-PSPSPS Mod 1. Engineered for builders seeking an affordable path to a fully ambidextrous AR-15 platform, this stripped lower receiver features an enlarged magazine well and is specifically machined to accept optional HK or Sig ambi bolt catch/release levers. Key Features CNC machined from 7075-T6 forging for exceptional strength and durability in demanding tactical applications. Hard coat anodized black finish provides corrosion resistance and a professional appearance. Largest magazine well available on a standard forged AR-15 lower receiver, improving reload speed and compatibility with a wide range of magazines. Machined to accept HK & Sig ambi bolt catch/release levers (levers not included), enabling seamless left- or right-handed operation when paired with compatible components. Threaded bolt catch retaining pin and threaded rear takedown detent spring retainer for secure, reliable assembly. M4-style fire control group pocket machined to current government prints for compatibility with standard AR-15 components. Specifications Platform: AR-15 Material: 7075-T6 Aluminum Alloy Finish: Hard Coat Anodized Black Trigger Guard: Not Included Stock: Not Included Ambi Controls: Not Included (designed for optional addition) Magwell Embellishment: Logo Caliber Markings: None Weight: 11.2 oz Dimensions: 9.1" L x 4.3" W x 2.3" H Why Choose This Product This lower receiver addresses common pain points for ambidextrous builds by offering a cost-effective foundation without compromising on quality or fit. The widemouth design enhances magazine insertion under stress, while the threaded features simplify installation of aftermarket parts. Note that lug pockets are milled at the lower end of specification for a potentially snug upper receiver fit; uppers at the high end of spec may require minor fitting. Manufactured in-house by Bad Attitude Department, this Mod 1 model delivers professional-grade performance for custom tactical firearms projects. FAQs Q: Are ambidextrous controls included? A: No, the receiver is machined to accept optional HK or Sig ambi bolt catch/release levers and a left-side magazine release, which must be purchased separately. Q: What caliber is marked on the receiver? A: No caliber markings are present, allowing flexibility for multi-caliber builds. Q: Is a trigger guard included? A: No, the trigger guard is not included and must be added separately.