Superior Defense has announced the release of the SD13 stripped lower receiver, emphasizing it as the final run of black stripped lowers branded as TANK LOWERS. The lowers, manufactured by ZEV TECHNOLOGIES from high-quality 7075-T651 aluminum, feature superior machining and finishes designed for optimal performance and fit. Future color variations are planned.
Superior Defense states “This is going to be the last run of black stripped lowers that we are going to run with SUPERIOR DEFENSE as TANK LOWERS. We have some other lowers coming out later this year and in the future we are going to release other colors in small batches.”
KEY DETAILS:
- Lowers are being made by ZEV TECHNOLOGIES.
- Material: 7075-T651 Aluminum
- Finish: True Black Class 2 Type 3 Hard Coat Anodize | Bright Dip Black
- Tolerance: 0.001″
- Machined from Forged American Made 7075-T651 aluminum
- Machined with BETTER than Mil-Spec requirements, with critical tooling
- True Black Class 2 Type 3 Hard coat anodize
- Bright Dip Black
- Generous flare cut to the magazine well for quick magazine changes
- Nylon tipped tension screw for adjusting fitment to various uppers
- Threaded / Captured rear takedown
- Threaded Bolt catch
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