SHOP CLOSEOUT – UNFIRED – JUST MISSING THE BLISTER PACKAGING. PLEASE NOTE THAT MY PHOTOS SHOW LOTS OF LINT AND DUST – NOT SCRATCHES OR DEFECTS IN THE FINISH UNLESS NOTED. RARE AND UNIQUE 300 AAC BLACKOUT BARREL FOR THE THOMPSON CENTER CONTENDER – 18.5RIFLE BARREL – JOINT VENTURE BARREL BY MGM AND GREEN MOUNTAIN. CHAMBERED IN THE 300 AAC BLACKOUT CARTRIDGE. A JOINT VENTURE BETWEEN TWO OF THE BEST IN THE INDUSTRY. GREEN MOUNTAIN AND MGM – THINK BRANCH MEANLEY 30 national shooting records in 23 years of competitive shooting, including winning ten different national divisions a total of 22 times! – THINK MATCH GRADE MACHINE. 18.5 OAL HEAVY BULL BARREL – BORE IS BEAUTIFUL – BLUING IS PERFECT – UNFIRED, BUT NO ORIGINAL BUBBLE PACKAGING – EXCELLENT CONDITION BARREL. THE 300 AAC BLACKOUT CARTRIDGE. 300 AAC Blackout designated as the 300 BLK by the SAAMI and 300 AAC Blackout by the C. , also known as 7.62×35mm is an intermediate cartridge developed in the United States by Advanced Armament Corporation (AAC) for use in the M4 carbine. Its purpose is to achieve ballistics similar to the 7.62×39mm cartridge, or even more similarly, the 7.92×33mm Kurz cartridge in an AR-15 while using standard AR-15 magazines at their normal capacities. Care should be taken not to use 300 BLK ammunition in a rifle chambered for 7.62×40mm Wilson Tactical. To meet this demand AAC developed the 300 AAC Blackout in cooperation with Remington Defense. The new cartridge was intended to negate many of the perceived drawbacks inherent to other large caliber cartridges used in the M4. Colt Firearms and other arms makers had previously chambered AR-pattern rifles and carbines in various. 30 caliber rounds but encountered problems. In the case of the 7.62×39mm, its relatively severe case angle caused feeding issues unless specially modified AK-47 magazines were used, and even then results were unsatisfactory. Modified bolts were also needed owing to its larger case head diameter. Rounds such as the 6.8 SPC and 6.5 Grendel had similar part-interchangeability issues but did allow for the use of the standard M4/M16 30-round magazine, albeit with a reduced capacity. Wildcat cartridges such as the. 300 Whisper series addressed these issues, but their widespread use in single shot handguns and lack of industry standard cartridge dimension meant that a great number of the popular loads on both the supersonic and subsonic end of the spectrum were less than ideal in the AR pattern weapons. Many of these rounds required an excessively long overall cartridge length that would prohibit feeding in a STANAG magazine while using powder charges that were not compatible with the pressure requirements of the M4 carbine. This was particularly noticeable when using subsonic ammunition in conjunction with a suppressor as short stroking and excessive fouling would occur similar to that which was seen in the earliest variants of the M16 in Vietnam. Robert Silvers, director of research and development for AAC said, We started development in 2009, but most of the work was done in 2010. A military customer wanted a way to be able to shoot. Bullets from an M4 platform while using normal bolts and magazines, and without losing the full 30-round capacity of standard magazines. They also wanted a source for ammunition made to their specs. We could not have just used. 300 Whisper because Remington is a SAAMI company, and will only load ammunition that is a SAAMI-standard cartridge. We had to take the. 300-221 wildcat concept, determine the final specs for it, and submit it to SAAMI. We did that, and called it the. Bullet diameter0.308 in (7.8 mm). Neck diameter0.334 in (8.5 mm). Base diameter0.376 in (9.6 mm). Rim diameter0.378 in (9.6 mm). Case length1.368 in (34.7 mm). Rifling twist1 in 12. FROM THE PERSONAL COLLECTION OF THE LOS ANGELES COWBOY. THIS IS A SUPERB OPPORTUNITY FOR A SHOOTER OR COLLECTOR TO OBTAIN MANY RARE AND UNIQUE PARTS FROM MY COLLECTION. HISTORY OF THOMPSON CENTER FIREARMS. Thompson Center Arms was the brain child of Warren Center, a firearms engineer who was employed by Harrington & Richardson Arms Company (1871 to 1986) who history goes back to Frank Wesson, brother of Daniel B. Wesson who co-founded Smith & Wesson. Frank Wesson started a firearms manufacturing firm in 1859, sharing an early patent with Nathan Harrington. He started a brief partnership in 1871 with his nephew Gilbert Henderson Harrington, as Wesson & Harrington, until Harrington bought him out in 1874. In 1875 Harrington and another former Wesson employee, William Augustus Richardson, formed the new Harrington & Richardson Company. In 1888 the firm was incorporated as The Harrington & Richardson Arms Company. Warren Center then joined the K. Thompson Tool Company in 1965, and together, they announced Warren Center’s Contender pistol in 1967. In his basement at home, he designed an unusual single shot break action handgun with interchangeable barrels which is known today as the Contender handgun. Thompson Tool began marketing Center’s Contender pistol, the company name was changed to Thompson/Center Arms Company. This increasingly popular pistol was quickly accepted among silhouette shooters as well as the handgun hunting fraternity. Thompson Tool Company was located in Rochester, NH and decided to change their name to Thompson / Center Arms Company shortly after they began marketing their Contender handgun. Three years later in 1970, Thompson / Center Arms created the modern black powder industry, introducing Warren Center’s Hawken-styled black powder muzzle-loader rifle which was the first of an ever growing line of muzzle loading firearms. In 1996, a major fire broke out in the factory destroying all tooling and parts for three of their muzzle loading firearms lines: the Seneca rifle, the Patriot pistol, and the Scout which was one of their newer in line muzzle loaders. As a result, they were discontinued in 1997. Today, Thompson Center Arms produces a variety of quality rifles, handguns and muzzle loaders for the hunter and competitive shooter. The memory of of Warren Center’s great contribution to the development of the single shot platform lives on through The Thompson/Center Association which was formed in 1986 by a group of dedicated collectors at the behest of Thompson/Center Arms factory officials. Their goal for more than 30 years has been to document and categorize the many products of the Thompson/Center Arms Company as well as to promote the use and collecting of said items. As a group, they track and maintain records of various items that have surfaced throughout the years such as flat side and Eagle etched Contender frames as well as many of the hard to find octagonal barrel offerings. The Los Angeles Cowboy is a proud member of the Thompson/Center Association. PLEASE NOTE THAT I HAVE NO IDEA HOW MANY ROUNDS WERE FIRED THROUGH ANY OF MY BARRELS. IF I BELIEVE IT TRUE TO BE AN UNFIRED BARREL, THE AD WILL STATE SO. AS WITH ALL USED PRODUCTS, THIS MAY REQUIRE CLEANING TO MEET YOUR DISCERNING STANDARDS. WARNING : THIS PRODUCT IS TO BE INSTALLED BY A COMPETENT GUNSMITH. NO LIABILITY IS EXPRESSED OR IMPLIED FOR DAMAGE OR INJURY WHICH MAY RESULT FROM INSTALLATION OR USE OF THIS PRODUCT. SOME FITTING MAY BE REQUIRED. I WILL NOT BE HELD RESPONSIBLE IF THESE PARTS DO NOT FIT YOUR INTENDED USE OR NON INTENDED USE. SHOULD YOU FIND THESE PARTS DO NOT WORK FOR YOU THEN YOU ARE RESPONSIBLE FOR RESELLING, DONATING, GIFTING OR DOING AS YOU PLEASE WITH THEM IF NEEDED. WHAT YOU LEARN NOT FEAR MAKES YOU STRONGER, EXCEPT FOR BEARS. BEARS WILL KILL YOU! The item “RARE 300 ACC BLACKOUT UNIQUE 18.5 BLUED T/C CONTENDER MGM GREEN MOUNTAIN RIFLE” is in sale since Tuesday, June 18, 2019. This item is in the category “Sporting Goods\Hunting\Gun Parts\Rifle”. The seller is “losangelescowboy” and is located in Sherman Oaks, California. This item can be shipped to United States.
- Specific Part: BARREL
- Brand: T/C MGM GREEN MOUNTAIN
- Compatible Caliber: 300 ACC BLACKOUT
- For Gun Make: Thompson Center
- Type: Barrel
- For Gun Model: CONTENDER