SARCO INC. .45 barrels:
Built to precise tolerance by a special hammer forging process, it forms the barrel around a precision mandrel and holds the tolerance to .0001″.
All Roto-4M barrels are made in the U.S.A. These barrels are made by the Special Roto-4M hammer forge process which produces the most precise and consistent barrels for the best accuracy.
*Does not include barrel bushing or barrel link.
*Minor hand fitting may be necessary by a competent gunsmith, failure to do so may cause serious injury or death.

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https://www.za.bulletcentral.com/sho...-acp-barrel-5/


WILSON COMBAT .45 barrels:Wilson Combat® Match-Grade Barrels are known for their unsurpassed quality and accuracy.
1 in 16″ Twist
Fully Machined From Aircraft Grade Stainless Steel Forgings
Heat-Treated To R/C 40 For Maximum Service Life
Critical Manufacturing Tolerances Are Held To Less Than .0005″ (One Half Thousandth Of An Inch!)
Glass Smooth Chamber And Perfectly Concentric With The Bore
Detailed Final Inspection Prior To Receiving The Wilson Name On The Hood
Critical Lock-Up Contact Areas Cut To A Dimension That Provides A Good Lock-Up In Most Colt And Springfield Armory Pistols
Includes Barrel Bushing

Fits The Following Full-Size 1911 Handguns:
AMT – Hardballer
Caspian – Government Model, Enhanced Government Model, Hi-Caps
Colt – Government Model, Gold Cup, Double Eagle
Detonics – Scoremaster
Essex
Kimber
Military Issue
Norinco
Para-Ordnance – P14
Rock Island
Rock River
Safari Arms – Matchmaster
Sig Sauer – GSR
Smith & Wesson
Springfield Armory
Strayer-Tripp-Voight – 2011
Taurus
Wilson Combat

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https://www.za.bulletcentral.com/sho...pistol-barrel/