Stern Defense 9mm Complete Bolt Carrier Group, Mag-Phosphate Finish - SD BU9
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Stern Defense
Overview
The Stern Defense 9mm Complete Bolt Carrier Group is designed specifically for 9mm builds, ensuring reliable cycling and performance in your firearm. The phosphate finish provides corrosion resistance and durability, making it suitable for various environmental conditions. This bolt carrier group is commonly found in pistol-caliber carbines and other 9mm AR-15 configurations, offering builders a solid foundation for their projects.
Specifications
Stern Defense 9mm Complete Bolt Carrier Group, Mag-Phosphate Finish - SD BU9
Available Merchants(4)
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Build history on GunPartPicker
Builders on GunPartPicker first added the Stern Defense 9mm Complete Bolt Carrier Group, Mag-Phosphate Finish - SD BU9 to a build in October 2026.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today all 4 retailers we track have it in stock. It dipped to $129.99 at Optics Planet for a stretch in September 2026, well under its usual $146.99, so sales do come around. Buying today, the lowest price is $129.99 at Brownells, which matches the best price we saw in September.
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