Firearm extractor
Provided herein are extractors, bolt assemblies, firearms, and related methods, devices, and assemblies. A firearm extractor includes a first end, a second end opposite the first end, an axis defined between the first end and the second end, and a pivot portion between the first end and the second end. The extractor may include a notch defined at the inner side of the extractor at an axial location between the pivot portion and the first end that, in operation, engages a cartridge casing having a diameter greater than a casing of a 5.56 NATO cartridge or other platform-standard cartridge. A thickness of the extractor in at least one location defined at the axial location of the notch disposed radially inward of one or more lugs of a barrel or a barrel extension during cycling of the bolt may be greater than 0.019 inches.
1. A firearm extractor having a maximum width, the firearm extractor comprising:
a first end;
a second end opposite the first end, the first end and the second end defining an axis extending therebetween;
a pivot portion defined between the first end and the second end, the pivot portion disposed at an inner side of the extractor, wherein the pivot portion is configured to engage a bolt;
a support tower defined at an outer side of the extractor and positioned forward of the pivot portion, the support tower having a width that is less than the maximum width of the extractor; and
a notch defined at the inner side of the extractor at an axial location between the pivot portion and the first end, wherein, in operation, the notch is configured to engage a cartridge casing having a diameter greater than a casing of a 5.56 NATO cartridge,
wherein a thickness of the extractor in at least one location defined at the axial location of the notch is greater than 0.019 inches, wherein the at least one location is configured to be disposed radially inward of one or more lugs of a barrel or a barrel extension during cycling of the bolt,
wherein the notch has a curved configuration defined at least in part by an inner surface that is curved in a circumferential direction perpendicular to the axis, and
wherein outer surfaces of the outer side of the extractor that are adjacent to and flank with the support tower define sloped regions that slope upwardly toward the first end from a location that is forward of an aft-most end of the support tower.
2. The extractor according to claim 1 , wherein the thickness at the at least one location is greater than or equal to approximately 0.043 inches and less than or equal to approximately 0.055 inches.
3. The extractor according to claim 2 , wherein the thickness at the at least one location is approximately 0.043 inches.
4. The extractor according to claim 2 , wherein the thickness at the at least one location is approximately 0.055 inches.
5. The extractor according to claim 1 , wherein the thickness at the at least one location is less than or equal to approximately 0.055 inches.
6. The extractor according to claim 1 , wherein the thickness at the at least one location is greater than or equal to approximately 0.043 inches.
7. The extractor according to claim 1 , further comprising a support tower defined at an outer side of the extractor opposite the inner side at an axial location of the extractor between the pivot portion and the first end, wherein the support tower defines a width in a circumferential direction perpendicular to the axis that is less than a width of the extractor, and wherein the support tower is positioned at a location other than the at least one location having the thickness that is greater than 0.019 inches.
8. The extractor according to claim 7 , wherein the thickness of the extractor in all locations in a circumferential direction along a length of the notch, perpendicular to the axis, other than the location of the support tower is greater than 0.019 inches.
9. The extractor according to claim 7 , wherein a height of an outer surface of the outer side of the extractor at the at least one location relative to the axis is greater than a height of the outer surface of the outer side of the extractor elsewhere along a length of the extractor.
10. The extractor according to claim 7 , wherein a height of an outer surface of the outer side of the extractor at the at least one location relative to the axis is greater than the height of a 5.56 extractor for an AR pattern firearm.
11. The extractor according to claim 1 , further comprising a recess defined by the first end.
12. The extractor according to claim 1 , wherein a length of the notch defined between a proximal end and a distal end, the distal end being located in between the proximal end of the notch and the first end of the extractor, and wherein a first depth of the notch defined in the radial direction between an inner surface of the notch and a proximal edge at the proximal end is greater than a second depth defined in the radial direction between the inner surface and a distal edge at the distal end of the notch.
13. The extractor according to claim 1 , wherein the extractor defines a constant width along an entire length of the extractor.
14. The extractor according to claim 1 , wherein the thickness from an outer side of the extractor to the inner surface of the notch measured perpendicular to the inner surface of the notch is greater than 0.0019 at each location along the inner surface of the notch.
15. The extractor according to claim 1 , wherein the sloped regions slope upwardly to a location that is axially aligned with the notch.
16. The extractor according to claim 1 , wherein the thickness at the at least one location is a minimum thickness of the extractor at the axial location of the notch.
17. A bolt assembly for a firearm comprising:
a bolt configured to engage one or more lugs of a barrel or a barrel extension during cycling of the bolt, the bolt defining a groove; and
the extractor according to claim 1 received by the groove of the bolt and pivotally attached with the bolt via the pivot portion of the extractor.
18. A firearm comprising:
barrel assembly comprising:
a barrel or a barrel extension defining one or more locking lugs,
the barrel comprising an inner surface defining a bore configured to guide a projectile as the projectile is propelled through the bore by pressurized gas, the barrel defining:
a muzzle end; and
a chamber end opposite the muzzle end, wherein the inner surface defines a chamber at the chamber end, wherein the chamber is configured to receive a cartridge and to support at least a portion of a cartridge casing during firing;
a bolt defining:
one or more bolt lugs configured to engage the one or more locking lugs of the barrel extension; and
a groove; and
the extractor according to claim 1 received by the groove of the bolt and pivotally attached with the bolt via the pivot portion of the extractor.
19. The firearm of claim 18 , wherein the firearm is an AR-15 platform weapon.
20. A firearm extractor having a maximum width, the firearm extractor comprising:
a first end;
a second end opposite the first end, the first end and the second end defining an axis extending therebetween;
a pivot portion defined between the first end and the second end, the pivot portion disposed at an inner side of the extractor, wherein the pivot portion is configured to engage a bolt;
a support tower defined at an outer side of the extractor and positioned forward of the pivot portion, the support tower having a width that is less than the maximum width of the extractor, the support tower having a planar top that extends axially; and
a notch defined at the inner side of the extractor at an axial location between the pivot portion and the first end, wherein, in operation, the notch is configured to engage a cartridge casing having a diameter greater than a casing of a 5.56 NATO cartridge,
wherein a thickness of the extractor in at least one location defined at the axial location of the notch is greater than 0.019 inches, wherein the at least one location is configured to be disposed radially inward of one or more lugs of a barrel or a barrel extension during cycling of the bolt,
wherein the notch has a curved configuration defined at least in part by an inner surface that is curved in a circumferential direction perpendicular to the axis, and
wherein an outer surfaces of the outer side of the extractor that are adjacent to and flank with the support tower define sloped regions that slope upwardly toward the first end to a location that is forward of an aft end of with the planar top of the support tower.
21. A method of manufacturing at least a portion of a firearm extractor, the method comprising:
providing a body defining:
a first end;
a second end opposite the first end, the first end and the second end defining an axis extending therebetween; and
a maximum width;
providing a pivot portion positioned between the first end and the second end, the pivot portion disposed at an inner side of the body of the extractor, wherein the pivot portion is configured to engage a bolt;
providing a support tower defined at an outer side of the extractor and positioned forward of the pivot portion, the support tower having a width that is less than the maximum width of the extractor; and
removing material from the body to define a notch at the inner side of the extractor at an axial location between the pivot portion and the first end, wherein, in operation, the notch is configured to engage a cartridge casing having a diameter greater than a casing of a 5.56 NATO cartridge, wherein the notch has a curved configuration defined at least in part by an inner surface that is curved in a circumferential direction perpendicular to the axis; and
removing material from an outer surface of the body opposite the inner surface to define a thickness of the extractor in at least one location defined at the axial location of the notch disposed radially inward of one or more lugs of a barrel or a barrel extension during cycling of the bolt, wherein the thickness is greater than 0.019 inches,
wherein the removing of material from the outer surface of the body follows a path that defines a sloped region that slopes upwardly toward the first end from a location that is forward of an aft-most end of the support tower.
22. The method according to claim 21 , wherein removing material from the outer surface further defines a support tower extending from the outer surface of the extractor at an axial location of the extractor between the pivot portion and the first end, wherein the support tower defines a width in a circumferential direction perpendicular to the axis that is less than a width of the extractor, and wherein the support tower is positioned at a location other than the at least one location.
23. The method according to claim 21 , further comprising removing material from the first end to define a recess in the first end.