Sons of Liberty Gun Works L89 AR-15 8.5 inch .300BLK Upper Receiver Group Medium Midlength 1-7 ASR Black
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Sons of Liberty Gun Works
Overview
The Sons of Liberty Gun Works L89 AR-15 Upper Receiver Group is a complete assembly designed for .300 Blackout, featuring an 8.5-inch barrel with a mid-length gas system. The 1:7 twist rate enhances the stability and accuracy of heavier bullets, making this upper ideal for both suppressed and unsuppressed shooting. This upper receiver group is commonly found in short-barreled rifle builds where compactness and versatility in ammunition selection are key considerations.
Specifications
Sons of Liberty Gun Works L89 AR-15 8.5 inch .300BLK Upper Receiver Group Medium Midlength 1-7 ASR Black
Available Merchants(4)
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September 2026 on GunPartPicker
Sons of Liberty Gun Works L89 AR-15 8.5 inch .300BLK Upper Receiver Group Medium Midlength 1-7 ASR Black ranked #267 of the 615 upper receivers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since May 2026. All time, it ranks #465 of the 1,654 upper receivers builders have added.
It was hard to find in September 2026, in stock on only 3 of the 26 days we checked, and today 2 of the 4 retailers we track have it in stock. Prices barely moved in September 2026, holding around $1,050, so there haven't been real sales lately. Buying today, the lowest price is $1,041.35 at KY Gun Company, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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