Proof Research AR-Type Barrel 12.50" for AR-Style, Natural - 100523
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Proof Research
Overview
The Proof Research AR-Type Barrel measures 12.50 inches in length and is designed for the 300 Blackout caliber, featuring a lightweight profile that aids in maneuverability and overall handling. Its pistol-length gas system ensures reliable cycling with subsonic ammunition while the 1:8 twist rate stabilizes heavier projectiles, making it suitable for a variety of shooting applications. This barrel is often found in builds that prioritize compactness and versatility, particularly for those looking to optimize their AR platform for specific tactical or hunting scenarios.
Specifications
August 2026 on GunPartPicker
Proof Research AR-Type Barrel 12.50" for AR-Style, Natural - 100523 ranked #97 of the 298 barrels builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since March 2026. All time, it ranks #222 of the 763 barrels builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, but today 2 of the 6 retailers we track have it in stock. Prices barely moved in August 2026, holding around $951.49, so there haven't been real sales lately. Buying today, the lowest price is $951.49 at Ammunition Depot, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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Frequently Built With
The part most often added in each category by the 5 builds that include this one
Wilson Combat AR-15 Billet Upper Receiver
Aero Precision M4E1 Stripped Lower Receiver - Kodiak Brown Anodized
POF USA Strike Eagle Ambidextrous AR-15 Charging Handle
Phase 5 Tactical 10.5 Lo-PRO Slope Nose Free Float Quad Rail Black
Aero Precision AR-15 5.56 BCG W/C158 Bolt - Aero Logo - Phosphate
JP Enterprises .750 Adjustable Gas Block - Stainless
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
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