Receiver for an autoloading firearm

  • US 8,342,075 B2
  • Filed: 03/13/2012
  • Issued: 01/01/2013
  • Est. Priority Date: 03/10/2009
  • Status: Active Grant
First Claim
Patent Images

1. A firearm with a gas operating system and a dual receiver assembly, comprising:

  • an upper receiver assembly configured for receiving magazine-fed ammunition, and having a mechanism for manually reciprocating the action of the firearm;

    a lower receiver assembly attached to the upper receiver assembly, said lower receiver assembly being configured to have an ammunition magazine attached thereto for supplying ammunition from the ammunition magazine to the upper receiver assembly;

    said upper receiver assembly being detachable from the lower receiver assembly;

    a buffer tube having a bore with a forwardly facing opening;

    a bolt carrier assembly operative with said buffer tube during firearm operation;

    said lower receiver having a support element located in front of the buffer tube opening to support and guide the rear of the bolt carrier assembly during the normal operation of the firearm, said support element having an external surface which substantially occupies a same plane as the bore of the buffer tube, said plane being defined by a lower side of the buffer tube opening.

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