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Posted: 9/18/2013 10:51:38 AM EDT
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When did Forward Assist and Deflector appear on Colt AR15 Rifles?
When did 1/9 barrels replace 1/12 twist on Colt AR15 Rifles? When did Colt start using A2 flash hiders on AR15 Rifles? |
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Quoted:
When did Forward Assist and Deflector appear on Colt AR15 Rifles? When did 1/9 barrels replace 1/12 twist on Colt AR15 Rifles? When did Colt start using A2 flash hiders on AR15 Rifles? 1. 1966....Adopted in 1967 with the M16A1. Deflector or Brunton bump not until the intro of the A2 2. Mid 80's....Not a USGI twist. 1/9 is a civilian twist rate. USGI jumped from 1/12 to 1/7. 3. With the introduction of the A2 1982 ' ish....maybe a little later on SP1's |
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The spent casing deflector was developed by Rock Island Arsenal employee Loren Brunton who filed for a patent in June 1983. Source: http://www.thegunzone.com/556dw-8.html
It was incorporated into the M16A2, replacement A1 uppers, and Colt's commercial rifles and carbines with the A1 field sights that are often referred to as "C7" uppers after the Canadian weapon developed in parallel to the US M16A2. ETA: Brunton received patents for the idea in 1986 and 87. Source: http://www.thegunzone.com/556dw-9.html |
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