A feed ramp system for feeding cartridges into the chamber of a firearm. The feed ramp system includes a feed ramp insert having a body with at least one attachment tab projecting therefrom. The feed ramp insert is received within a mating recess formed in the receiver and is removably coupled to th
A feed ramp system for feeding cartridges into the chamber of a firearm. The feed ramp system includes a feed ramp insert having a body with at least one attachment tab projecting therefrom. The feed ramp insert is received within a mating recess formed in the receiver and is removably coupled to the receiver to enable replacement of the feed ramp insert. The feed ramp insert includes a pair of proximal ramp surfaces that align with distal ramp surfaces form at a breech end of the firearm barrel, to define a pair of feed ramps for directing cartridges into the chamber.
대표청구항▼
1. A firearm, comprising: a barrel assembly having a breech end at which a chamber is formed, the breech end comprising a plurality of radially spaced barrel lugs, and at least one distal ramp surface formed between selected ones of the barrel lugs;a receiver having a forward end coupled to the barr
1. A firearm, comprising: a barrel assembly having a breech end at which a chamber is formed, the breech end comprising a plurality of radially spaced barrel lugs, and at least one distal ramp surface formed between selected ones of the barrel lugs;a receiver having a forward end coupled to the barrel assembly adjacent the breech end of the barrel assembly; anda replaceable feed ramp insert comprising a body having at least one proximal ramp surface, and at least one attachment member projecting from the body and configured for releasably coupling the feed ramp insert in an engaged position between the receiver and the breech end of the barrel assembly, with the at least one proximal ramp surface substantially aligned with the at least one distal ramp surface of the barrel assembly so as to form at least one feed ramp for directing cartridges into the chamber of the firearm;wherein the receiver comprises a mating aperture formed therein, and wherein the body of the feed ramp insert is configured to be received within the mating aperture of the receiver and comprises a pair of proximal ramp surfaces configured to align with corresponding ones of a pair of distal ramp surfaces of the barrel assembly to form a pair of feed ramps for directing cartridges into the chamber of the firearm. 2. The firearm of claim 1, wherein the receiver is made from a first metallic material and the feed ramp is made from a second metallic material that is different from the first metallic material. 3. The firearm of claim 1, wherein the distal ramp surfaces comprise a first surface hardness and the proximal ramp surfaces comprise a second surface hardness that is substantially equal to the first surface hardness. 4. The firearm of claim 1, wherein the distal ramp surfaces comprise a first surface hardness and the at least one proximal ramp surfaces comprise a second surface hardness that is different from the first surface hardness. 5. The firearm of claim 1, wherein the barrel assembly further comprises a barrel extension coupled to a barrel body adjacent the breech end of the barrel assembly, with the barrel extension defining the breech end of the barrel assembly including the barrel lugs and at least one distal ramp surface defined therein. 6. The firearm of claim 1, wherein a slope of the at least one proximal ramp surface of the feed ramp insert relative to a longitudinal axis of the barrel assembly is substantially equal to a slope of the at least one distal ramp surface of the barrel assembly. 7. The firearm of claim 1, wherein a surface area of at least one proximal ramp surface is greater than a surface area of at least one distal ramp surface. 8. The firearm of claim 1, wherein the breech end of the barrel assembly further comprises a breech face having a notch configured to releasably receive at least a portion of the body of the feed ramp insert therein. 9. A firearm, comprising: a barrel assembly having a breech end at which a chamber is formed, the breech end comprising a plurality of radially spaced barrel lugs, and at least one distal ramp surface formed between selected ones of the barrel lugs;a receiver having a forward end coupled to the barrel adjacent the breech end of the barrel; anda replaceable feed ramp insert comprising a body having at least one proximal ramp surface and configured for releasably coupling in an engaged position between the receiver and the breech end of the barrel, with the at least one proximal ramp surface substantially aligned with the at least one distal ramp surface of the barrel so as to form at least one feed ramp for directing cartridges in to the chamber of the firearm; anda pair of attachment members projecting on opposite sides of the feed ramp body, and wherein the feed ramp insert is mounted within the receiver by removable fasteners received through attachment holes formed in the pair of attachment members and corresponding fastener apertures of the receiver. 10. A firearm, comprising: a barrel having a breech end at which a chamber is formed, and a circumferential rim defining a breech face and including a plurality of barrel lugs radially spaced thereabout, and a pair of distal ramp surfaces formed between selected ones of the barrel lugs;a notch formed in the circumferential rim of the breech end of the barrel;a receiver having a forward end configured to couple to the barrel and having a mating aperture formed adjacent the breech end of the barrel; anda feed ramp insert having a body configured to be matingly received within the mating aperture of the receiver and the notch of the barrel, with at least one attachment member projecting from the body for coupling the feed ramp insert to the receiver, and a pair of proximal ramp surfaces extending along the body and configured so as to substantially align with the distal ramp surfaces of the breech face to define feed ramps for directing cartridges into the chamber of the firearm;wherein the feed ramp insert comprises a replaceable insert removably mounted between the receiver and barrel. 11. The firearm of claim 10, wherein a slope of the proximal ramp surfaces relative to the longitudinal axis is substantially equal to a slope of distal ramp surfaces. 12. The firearm of claim 10, wherein the pair of proximal ramp surfaces has a curved profile and the angle of the curved profile relative to the longitudinal axis is configured to match an angle of the pair of distal ramp surfaces. 13. The firearm of claim 10, wherein a slope of the proximal ramp surfaces relative to the longitudinal axis is not equal to a slope of distal ramp surfaces. 14. The firearm of claim 10, wherein the receiver is made from a first metallic material and the feed ramp is made from a second metallic material that is different from the first metallic material. 15. A firearm, comprising: a barrel assembly having a breech end at which a chamber is formed, the breech end comprising a plurality of radially spaced barrel lugs, and a pair of feed ramp surfaces formed between selected ones of the barrel lugs;a receiver having a forward end coupled to the barrel assembly adjacent the breech end thereof; anda replaceable feed ramp insert comprising a body configured for releasably fitting in an engaged position between the receiver and the breech end of the barrel assembly, the body including at least one ramp surface of the feed ramp insert substantially aligned with at least one of the feed ramp surfaces of the barrel so as to form at least one feed ramp for directing cartridges into the chamber;wherein the receiver includes an aperture configured to receive at least a portion of the body of the feed ramp insert therein so as to locate and mount the feed ramp in its engaged position between the receiver and the breech end of the barrel assembly. 16. The firearm of claim 15, wherein the barrel assembly comprises a barrel body and a barrel extension coupled to the barrel body adjacent the breech end of the barrel assembly, the barrel extension including the pair of feed ramp surfaces formed therein. 17. The firearm of claim 15, wherein the breech end of the barrel assembly further comprises a breech face having a notch configured to releasably receive at least a portion of the body of the feed ramp insert therein.
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이 특허에 인용된 특허 (156)
Compton, David W., Accessory rail mount adapter for rifles and carbines.
Spencer, Norman; Oakley, William T.; Mariani, Craig Albert; Mikuta, Richard Frederick; Fleury, Kevin Richard; Curry, Brett; Picard, Richard Anthony; Galarneau, Joseph A.; Valley, James, Firearm frame and barrel assembly.
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