SB Tactical 6 position MilSpec carbine receiver extension (buffer tube). Compatible with any MilSpec brace/accessory and great for your next build! Recommended for SBA3 and SBA4. Made from 7075 T6 Aluminum and hardcoat anodized. Proudly made in the USA.
Not compatible with non-adjustable braces (SBM4, SOB, SB Mini, etc.).
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Strike Industries
