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  1. Proof Research Barrel Blank 284 Caliber 1 in 8.4" Twist 5-Groove Carbon Fiber
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  2. Proof Research Barrel AR-10, LR-308 308 Winchester 1 in 10" Twist Carbon Fiber
    Proof Research Barrel AR-10, LR-308 308 Winchester 1 in 10" Twist C... Available View More Options
  3. Proof Research Barrel AR-15 223 Remington (Wylde) 1 in 8" Twist Carbon Fiber
    Proof Research Barrel AR-15 223 Remington (Wylde) 1 in 8" Twist Car... Mixed Availability View More Options
  4. Proof Research Barrel Blank 264 Caliber 1 in 8" Twist 4-Groove Carbon Fiber
    Proof Research Barrel Blank 264 Caliber 1 in 8" Twist 4-Groove Carb... Mixed Availability View More Options
  5. Proof Research Barrel AR-15 223 Remington (Wylde) Stainless Steel
    Proof Research Barrel AR-15 223 Remington (Wylde) Stainless Steel Mixed Availability View More Options
  6. Proof Research Barrel Blank 308 Caliber 1 in 10" Twist 5-Groove Carbon Fiber
    Proof Research Barrel Blank 308 Caliber 1 in 10" Twist 5-Groove Car... Mixed Availability View More Options
  7. Proof Research Barrel Ruger Precision Rifle Pre-Fit 308 Winchester 1 in 10" Twist 5-Groove 20" 5/...
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  8. Proof Research Barrel Blank 243 Caliber 1 in 7.5" Twist Stainless Steel
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  9. Proof Research Barrel Blank 284 Caliber Medium Sporter 1 in 9" Twist 24" Stainless Steel
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  10. Proof Research Barrel Blank 338 Caliber Sendero 1 in 9.4" Twist 5-Groove Carbon Fiber
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  11. Proof Research Barrel Savage Pre-Fit Standard Shank 223 Remington 1 in 8" Twist 5-Groove 20" 1/2"...
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  12. Proof Research Barrel Savage Pre-Fit Standard Shank 7mm-08 Remington 1 in 9" Twist 5-Groove 22" 5...
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