×

Rail adapter handguard systems for firearms

  • US 5,826,363 A
  • Filed: 07/10/1997
  • Issued: 10/27/1998
  • Est. Priority Date: 07/10/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. In a handguard attachment for a firearm including a barrel and having a gas tube defined by a front end section and a rear end section integrally joined by a central section extending longitudinally above said barrel, a circular receptor cap fixed to said barrel to encircle said barrel and said front end section of said gas tube, a spring biased slip ring positioned about said barrel rearward of said receptor cap, and a barrel nut carried on said barrel juxtaposed to said slip ring on the side of said slip ring facing said receptor cap, said handguard attachment including a top semicylinderical part defined by a first front end portion and a first back end portion and a bottom semicylinderical part defined by a second front end portion and a second back end portion, said first and second back end portions having back end ledges that engage with said slip ring and said first and second front end portions having front end ledges that engage with said receptor cap to retain said parts about said barrel,an improved rail adapter system which enables said firearm effectively to support accessory devices which comprises:

  • an accessory adapter rail extending longitudinally along said top semicylinderical part,an elongated leaf spring defined by a top side, a bottom side, a fore end, an aft end and an integral central portion, said fore end being slidingly held by said receptor cap, said aft end slidingly positioned in said top semicylinderical part and said bottom side of said central portion slidingly engaging a lateral element fixed within said first front end portion below said adapter rail whereby to bias said top semicylinderical part toward said barrel, anda rear clamp comprising a channelled body that straddles said rear end section of said gas tube having a stem end and stern end, said stem end being pivoted for movement of said rear clamp in a vertical plane upon a pin carried laterally within said top semicylinderical part, a pair of spaced apart lugs that extend aft from said stern end for engagement with said barrel nut and a screw fastener that extends through said adapter rail and threads into said channelled body whereby tightening of said screw fastener serves to tighten engagement of said lugs with said barrel nut.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×