Commercial Barrel ID - Gas Chambers
Printed From: The Carbine Collector's Club
Category: The Club
Forum Name: Commercial Carbines
Forum Description: Links to Information and recommendations
URL: http://www.uscarbinecal30.com/forum/forum_posts.asp?TID=6287
Printed Date: Sep 26 2023 at 12:10pm
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: Commercial Barrel ID - Gas Chambers
Posted By: sleeplessnashadow
Subject: Commercial Barrel ID - Gas Chambers
Date Posted: Jul 15 2022 at 2:26am
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The focus of this post is limited to the gas piston chambers along with the barrel design where they were attached. Most commercial carbine manufacturers did something unique that helps identify their barrels. Other areas of these barrels sometimes have additional uniqueness but this post is about gas piston chambers. The Barrel Manufacturers There have only been a few commercial .30 cal. carbine barrel manufacturers over the years. Only one in the 1960's thru the 1980's. There have been some slight differences so their gas piston areas are shown with the commercial carbine manufacturers who have used them. https://www.shawcustombarrels.com" rel="nofollow - Small Arms Manufacturing, now Shaw Custom Barrels (1960's-1980's) Bridgeville, PA Barrels were sold without a gas piston cylinder/housing. Buyers had to, and did, come up with their own. Each commercial carbine manufacturer that used these came up with their own unique design and/or method of attaching them to the barrel. Examples can be found below with Alpine, Bullseye, H&S, Iver Johnson, Millville Ordnance, National Ordnance, Plainfield, Rowen Becker and Universal Firearms https://criterionbarrels.com" rel="nofollow - Criterion Barrels (since 1999) Germantown, WI Swaged gas piston cylinders. Examples can be found below with Fulton Armory. http://www.gmriflebarrel.com" rel="nofollow - Green Mountain Rifle Barrel Company (since 1994) Conway, NH Swaged gas piston cylinders. Examples can be found below with IAI, Auto Ordnance, and Inland Mfg, Demilled Carbine Barrels with cut-down 1903A3 Barrels or other Inserts Over time some carbine manufacturers chose to piece together their own barrels using the rear half of demilled GI carbine barrels into which they inserted a cut down 1903A3 barrel or other barrel. The GI swaged gas piston cylinder from the demilled carbine was usually used.        ----------------------------------------------------------------------------------------------------------------------------------------------------------------  Top: Machined integral to barrel Bottom: Separate piece swaged on ---------------------------------------------------------------------------------------------------------------------------------------------------------------- ALM see IAI AMAC - unk barrel source (Iver Johnson 1986 & later)  Alpine - Small Arms Mfg  AMPCO receiver only Armscorp receiver only Auto Ordnance - Green Mountain   Bullseye - Small Arms Mfg   Ermas Mfg - 1903A3 inserts into demilled GI  Fed Ord - unk source but barrels are inserts into demilled GI rear half   Firearms International see IAI Fulton Armory - Criterion   Global Arms see Millville Ordnance H&S - Small Arms Mfg  Howa - made their own Carbines made for Thailand   Howa sportering carbine   Inland Mfg - Green Mountain    IAI - Green Mountain   Iver Johnson - Small Arms Mfg NJ & AR thru 1985   1986-end of production - barrel source unk   Johnson Arms see Plainfield Liberty Armory see IAI Mannlicher Sporting receiver only Millville Ordnance (MOCO) - Small Arms Mfg   National Ordnance - Small Arms Mfg   NATO see Plainfield Plainfield - Small Arms Mfg    Rock Island Armory unknown which barrels they used Rockola by James River Armory see Fulton Armory Rowen Becker - Small Arms Mfg & 1903A3 inserts into demilled GI Inserts  Small Arms Mfg   Springfield Armory barrel source unknown, most were receivers only but a few were sold with barrels Texas Armament no barrels, receiver only Universal Firearms - Small Arms Mfg  Top: Single recoil spring Bottom: Hybrid twin recoil spring Williams Gunsight see Plainfield |