Proof Research

Product Barrel Length Product Barrel Length 0 0.75'' 1 1 1/8" 1 5/8" 1 7/8" 1-1/8" 1-5/8" 1.1200 1.125" 1.13" 1.1300 1.42" 1.5" 1.5000 1.5800 1.6200 1.625" 1.63" 1.65" 1.6500 1.68" 1.75'' 1.87'' 1.87" 1.8700 1.875'' 1.875" 1.88" 1.8800 1.9000 1" 1" Heavy Barrel 10 10 1/2" 10.2500 10.3'' 10.3" 10.3" Government 10.3" S2W 10.30" 10.3000 10.4'' 10.4" 10.5 10.5'' 10.5" 10.50" 10.5000 10.8" 10'' 10" 11.1400 11.3'' 11.3" 11.5 11.5'' 11.5" 11.5" Government 11.5" Medium Contour 11.5" S2W 11.50" 11.5000 11.85" 11'' 11" 12 12.0" 12.3 12.3" 12.5 12.5'' 12.5" 12.50" 12.5000 12.7'' 12.8000 12.875 12.875'' 12.875" 12.88" 12.9'' 12.9" 12.9000 12'' 12" 13 13.25" 13.2500 13.5'' 13.5" 13.50" 13.7" 13.7" Pinned (16" OAL) 13.75" 13.8'' 13.8" 13.9'' 13.9" 13.9" Pinned (16" OAL) 13.95" 13'' 13" 14 14.17'' 14.1700 14.25" 14.25" Stand-Off 14.2500 14.37" 14.3700 14.375" 14.38" 14.5 14.5'' 14.5" 14.5" (w/Pinned Flash Hider) 14.5" M4 14.5" M4 Profile (16" OAL) 14.5" Pinned (16" OAL) 14.5" Pinned & Welded 14.50" 14.5000 14.7" 14.7" Pinned (16" OAL) 14.7" Pinned and Welded 14.70" 14.75'' 14.75" 14'' 14" 14" Pinned (16" OAL) 15 15.14'' 15.14" 15.1400 15" 16 16.04" 16.1 16.1'' 16.1" 16.1" Heavy Barrel 16.10" 16.1000 16.12'' 16.12" 16.12" Bull Barrel 16.12" Fluted BBL 16.12" Polished Stainless 16.1200 16.125'' 16.125" 16.125" Heavy Barrel 16.13" 16.1300 16.15" 16.1500 16.2'' 16.2" 16.20" 16.2000 16.25'' 16.25" 16.25" Fluted BBL 16.25" Fluted/Non-Threaded BBL 16.25" Medium Bull 16.25" Medium Bull BBL 16.2500 16.3'' 16.3" 16.30" 16.3000 16.37'' 16.37" 16.3700 16.375'' 16.4" 16.40" 16.4000 16.5 16.5'' 16.5" 16.5" C3 Carbon Barrel 16.5" Carbon Fiber 16.5" Heavy Sporter 16.50" 16.5000 16.6" 16.60" 16.6200 16.65" 16' 16'' 16" 16" Carbon Fiber 16" Carbon Fiber Jacketed BBL 16" Fluted 16" Government 16" KAC Cold Hammer Forged 16" Lightweight 16" LTW Contour 16" M4 Contour 16" M4 Profile 17 17.0" 17.25" 17.3000 17.4'' 17.4" 17.4000 17.5" 17.50" 17.5000 17'' 17" 18 18.0" 18.1" 18.1600 18.25'' 18.25" 18.2500 18.43'' 18.43" 18.4300 18.5 18.5'' 18.5" 18.5" & 28" 18.5" Breacher Barrel 18.5" Contoured BBL 18.5" Ported Barrel 18.5" VR 18.5"/28" 18.50" 18.5000 18.6'' 18.6" 18.6000 18.63" 18.6300 18.6600 18.75" 18.7500 18.875" 18'' 18" 18" Bull BBL 18" C3 Carbon Barrel 18" Carbon Fiber Barrel 18" Contoured BBL 18" DLC MK12-Profile Barrel 18" Fluted 18" Fluted Sporter Barrel 18" Heavy Threaded Barrel 18" Hybrid Profile 18" Medium Contour 18" Medium Heavy Barrel 18" S2W 18" Sporter Barrel 18" Stainless Steel 18" Straight Fluted Barrel 18" Strength-to-Weight Barrel 18" Target Barrel 18" Twisted Flute 19 19.0" 19.1" 19.10" 19.1000 19.25'' 19.25" 19.2500 19.375" 19.5'' 19.5" 19.7" 19.75'' 19.75" 19.7500 19.8'' 19.8" 19.8000 19'' 19" 2 2 1/2" 2 1/4" 2 1/8" 2 3/4" 2 5/8" 2.0" 2.1" 2.1200 2.125'' 2.125" 2.17" 2.19" 2.2'' 2.2" 2.20" 2.2000 2.25'' 2.25" 2.2500 2.3" 2.30" 2.3000 2.4" 2.4000 2.49" 2.4900 2.5'' 2.5" 2.50" 2.5000 2.53" 2.6200 2.625'' 2.625" 2.67" 2.68" 2.7'' 2.7" 2.70" 2.7000 2.75'' 2.75" 2.7500 2.8'' 2.8" 2.80" 2.8000 2.85" 2.9" 2.9000 2'' 2" 2"-2.5" 2"-3" 20 20.25" 20.2500 20.5'' 20.5" 20.5000 20.7500 20'' 20" 20" #1 Sporter Contour BBL 20" C3 Carbon Barrel 20" Carbon Fiber 20" Carbon Fiber Barrel 20" Carbon Fiber Jacketed BBL 20" Contoured BBL 20" Fluted BBL 20" Fluted Sporter Barrel 20" Fluted Stainless 20" Fluted Stainless Steel 20" Mega-Lite 20" Round BBL 20" Sporter Barrel 20" Straight Fluted Barrel 20" Twisted Flute 20" Vent Rib 21 21.37'' 21.375'' 21.375" 21.3800 21.5" 21.5" Ribbed Barrel 21'' 21" 22 22.0" 22.3000 22.4" 22.4" Fluted Barrel 22.40" 22.4000 22.5" 22.5" Stainless Steel 22.50" 22'' 22" 22" & 24" 22" C3 Carbon Barrel 22" Carbon Fiber 22" Carbon Fiber Barrel 22" Fluted & Threaded BBL 22" Fluted BBL 22" Fluted Sporter Barrel 22" Fluted Stainless 22" Fluted Stainless Steel 22" Lothar Walther Barrel 22" Medium Heavy Barrel 22" Rifled Barrel 22" Sporter Barrel 22" Sportsr Barrel 22" Twisted Flute 22" Vent Rib 22"/24" 23 23.2500 23.7" 23.7000 23" 23" Sporter Barrel 24 24.25" 24.3" 24.3" Fluted Barrel 24.30" 24.3000 24.33" 24.41" 24.5 24.5'' 24.5" 24.5" Chrome Lined 24.50" 24.5000 24.8'' 24.8" 24.8000 24'' 24" 24" / 24" 24" C3 Carbon Barrel 24" Carbon Fiber 24" Fluted 24" Fluted BBL 24" Fluted Sporter Barrel 24" Fluted Stainless 24" Fluted Stainless Steel 24" Heavy Barrel 24" Heavy Sporter 24" Medium Heavy Barrel 24" Sporter Barrel 24" Twisted Flute 24" VR 24"/24" 24"/26" 24"/28" 26 26'' 26" 26" (28" w/Brake) 26" Fluted 26" Fluted Heavy Sporter 26" Fluted Sporter Barrel 26" Heavy Barrel 26" Heavy Sporter 26" Medium Contour 26" Sporter Barrel 26" Vent Rib 26" VR 26"/24" 27 27" 28 28'' 28" 28" / 24" 28" & 18.5" 28" Contoured BBL 28" Fluted 28" Vent Rib 28" Vent Rib Barrel 28" VR 28"/18.5" 28"/24" 29 29" 3 3 1/16" 3 1/2" 3 5/8" 3.0" 3.00" 3.05'' 3.06" 3.0600 3.0625" 3.1'' 3.1" 3.10" 3.1000 3.13" 3.15" 3.18'' 3.18" 3.1800 3.2'' 3.2" 3.20" 3.2000 3.25'' 3.25" 3.25"-3.75" 3.2500 3.26'' 3.26" 3.2600 3.27" 3.2700 3.29'' 3.3'' 3.3" 3.30" 3.3000 3.32" 3.3200 3.35" 3.3500 3.37" 3.38" 3.3800 3.39'' 3.39" 3.3900 3.4" 3.40" 3.4000 3.41'' 3.41" 3.4100 3.42'' 3.42" 3.4200 3.43" 3.4300 3.46'' 3.46" 3.5 3.5'' 3.5" 3.5"-4" 3.5"-5" 3.50" 3.50"/5.10" 3.5000 3.54" 3.5400 3.55" 3.56'' 3.56" 3.5600 3.58" 3.5800 3.6'' 3.6" 3.60" 3.6000 3.6200 3.625" 3.63'' 3.63" 3.6300 3.64'' 3.64" 3.65" 3.6500 3.66" 3.6700 3.675'' 3.675" 3.68'' 3.68" 3.6800 3.7'' 3.7" 3.70" 3.7000 3.74'' 3.74" 3.7400 3.75'' 3.75" 3.7500 3.7600 3.77'' 3.78" 3.8'' 3.8" 3.80" 3.8000 3.83'' 3.83" 3.85" 3.8500 3.86" 3.87" 3.88" 3.8800 3.89'' 3.9'' 3.9" 3.90" 3.9000 3.92'' 3.92" 3.93" 3.9300 3.94" 3.9400 3.95" 3.98'' 3'' 3" 3" & 4" 3"-4" 3"-5" 3"/4" 30 30.5" 30.5000 30'' 30" 30" High Vent Rib 30" Ported 30" Vent Rib 30" VR 32 32'' 32" 32" & 34" 32"/34" 33 33" 34 34" 36 36" 4 4 1/5" 4 5/8" 4.0" 4.01'' 4.01" 4.0100 4.02'' 4.02" 4.0200 4.08'' 4.09 4.09" 4.0900 4.1'' 4.1" 4.10" 4.1000 4.11" 4.1100 4.125" 4.13'' 4.13" 4.1300 4.15" 4.17'' 4.17" 4.1700 4.18" 4.1800 4.19'' 4.19" 4.1900 4.2'' 4.2" 4.20" 4.2000 4.22'' 4.22" 4.2200 4.25'' 4.25" 4.25" Black DLC Bull Barrel 4.25" Coyote PVD Bull Barrel 4.25"- 5" 4.2500 4.27" 4.28'' 4.2800 4.3'' 4.3" 4.30" 4.3000 4.32" 4.3200 4.33" 4.35'' 4.35" 4.3500 4.37" 4.4'' 4.4" 4.40'' 4.40" 4.4000 4.41" 4.4100 4.42'' 4.42" 4.43'' 4.43" 4.44" 4.45" 4.4500 4.46'' 4.46" 4.4600 4.47" 4.48'' 4.48" 4.49 4.49'' 4.49" 4.4900 4.5'' 4.5" 4.50" 4.5000 4.53'' 4.53" 4.5300 4.57" 4.5700 4.5900 4.6'' 4.6" 4.60'' 4.60" 4.6000 4.61'' 4.61" 4.6100 4.62" 4.6200 4.625'' 4.625" 4.63" 4.64" 4.65" 4.6500 4.66" 4.67'' 4.68'' 4.68" 4.6800 4.69" 4.7'' 4.7" 4.70" 4.7000 4.71" 4.7100 4.75'' 4.75" 4.7500 4.8" 4.80" 4.8000 4.86" 4.8600 4.869" 4.87" 4.8700 4.875'' 4.89'' 4.89" 4.8900 4.9'' 4.9" 4.90" 4.9000 4.91" 4.925'' 4.925" 4.93" 4.94" 4.9400 4.95" 4.96" 4.97" 4.99'' 4.99" 4'' 4" 4" Ported 5 5 1/2" 5.0" 5.03'' 5.08" 5.09" 5.0900 5.1 5.1'' 5.1" 5.10" 5.1000 5.12" 5.1200 5.125" 5.1800 5.19" 5.1900 5.2'' 5.2" 5.20" 5.2000 5.23" 5.2300 5.25" 5.2500 5.28'' 5.28" 5.3'' 5.3" 5.30" 5.3000 5.31" 5.5'' 5.5" 5.5" Bull Barrel 5.50" 5.5000 5.5100 5.6'' 5.6" 5.6" Ported Barrel 5.6000 5.7" 5.74" 5.7400 5.75" 5.7500 5.755'' 5.8" 5.80" 5.8000 5.81'' 5.81" 5.83" 5.85" 5.87" 5.8700 5.9" 5.90" 5.9000 5.95" 5'' 5" 5" Bull Barrel 5" Coyote PVD Bull Barrel 5" DLC Bull Barrel 5" Spiral Fluted Barrel 5"-6.5" 6 6-1/2" 6.0" 6.02" 6.0900 6.2" 6.25" 6.2500 6.3" 6.5'' 6.5" 6.50" 6.5000 6.75'' 6.75" 6.7500 6.78" 6.78" Fluted Bull Barrel 6.8" 6.80" 6.88" 6.88" Fluted Bull Barrel 6.88" Slab-Sided Bull Barrel 6.8800 6.9" 6'' 6" 6" Bull BBL 6" Carbon Fiber Barrel 6" Carbon Fiber Target Barrel 7 7 1/2" 7 1/2" Magnaported Barrel 7-1/2" 7.0625" 7.25" 7.2500 7.3" 7.38" 7.49" 7.5'' 7.5" 7.5" Medium Contour 7.50" 7.5000 7.6" 7.65" 7.6500 7.75'' 7.75" 7.7500 7'' 7" 8 8 1/2" 8.125" 8.2" 8.2600 8.3'' 8.3" 8.3000 8.37" 8.375" 8.38'' 8.38" 8.3800 8.5'' 8.5" 8.50" 8.5000 8.75" 8.86" 8.9" 8.90" 8.9000 8'' 8" 9 9 1/2" 9.0500 9.10" 9.12" 9.1200 9.2" 9.2000 9.5'' 9.5" 9.50" 9.5000 9.6" 9.60" 9.6000 9.69" 9.75" 9'' 9"