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Proof Research 101681 AR-Style Barrel 223 Wylde 20" Rifle Length Gas System 1:8" Twist 4 Grooves, 1/2-28 tpi,
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Proof Research 106471 Bolt Action Barrel Blank 284 Cal 22" Sendero Contour 1:8" Twist 5 Grooves, Carbon Fiber
Proof Research 106556 Bolt Action Barrel Blank 284 Cal 26" Sendero Contour 1:8" Twist 5 Grooves, Carbon Fiber
Proof Research 100905 Bolt Action Barrel Blank 264 Cal 22" Sendero Contour 1:8" Twist 4 Grooves, Carbon Fiber
Proof Research 121665 AR-Style Barrel 6.5 Grendel 18" Rifle Length Gas System 1:8" Twist 4 Grooves, 5/8-24 tpi
Proof Research 106501 Bolt Action Barrel Blank 284 Cal 24" Sendero Contour 1:8" Twist 5 Grooves, Carbon Fiber
Proof Research 110157 Bolt Action Barrel Blank 308 Cal 24" Sendero Contour 1:9" Twist 5 Grooves, Carbon Fiber
Proof Research 107959 Bolt Action Barrel Blank 308 Cal 26" Sendero Contour 1:9" Twist 5 Grooves, Carbon Fiber
Proof Research 100028 AR-Style Barrel 308 Win 18" Rifle Length Gas System 1:10" Twist 5 Grooves, 5/8-24 tpi, C
Proof Research 101261 AR-Style Barrel 308 Win 16" Intermediate Length Gas System 1:10" Twist 5 Grooves, 5/8-24
Proof Research 101001 Bolt Action Barrel Blank 308 Cal 24" Sendero Contour 1:10" Twist 5 Grooves, Carbon Fiber
Proof Research 100998 Bolt Action Barrel Blank 308 Cal 22" Sendero Contour 1:10" Twist 5 Grooves, Carbon Fiber
Proof Research 100561 AR-Style Barrel 300 Blackout 16" Carbine Length Gas System 1:8" Twist 5 Grooves, 5/8-24
Proof Research 100523 AR-Style Barrel 300 Blackout 12.50" Pistol Length Gas System 1:8" Twist 5 Grooves, 5/8-2
Proof Research 100448 AR-Style Barrel 223 Wylde 18" Rifle Length Gas System 1:8" Twist 4 Grooves, 1/2-28 tpi,
Proof Research 100431 AR-Style Barrel 223 Wylde 16" Midlength Gas System 1:7" Twist 4 Grooves, 1/2-28 tpi, Car
Proof Research 100394 AR-Style Barrel 223 Wylde 11.50" Carbine length Gas System 1:7" Twist 4 Grooves, 1/2-28
Proof Research 100059 AR-Style Barrel 6.5 Creedmoor 24" Rifle +2 Length Gas System 1:8" Twist 4 Grooves, 5/8-2
Proof Research 100042 AR-Style Barrel 6.5 Creedmoor 20" Rifle +2 Length Gas System 1:8" Twist 4 Grooves, 5/8-2