Reduced Weight Firearm

Abstract

A rotating bolt firearm may be configured to fire a .308 cartridge. However, the firearm may have a reduced weight in comparison to standard .308 rifles. The firearm may have many components typically used in a .223 rifle. The firearm may include a barrel extension with an extractor gap, which allows a .308 bolt to fit within a .223 sized barrel extension. The firearm may comprise an elongated magazine well in comparison to a .223 mil-spec rifle. The firearm may weigh less than 6.8 pounds with a 16-inch barrel, or less than 6.3 pounds with a 10.5 inch barrel.

Claims

1. A rotating bolt firearm comprising: an upper receiver; a lower receiver coupled to the upper receiver; a barrel coupled to the upper receiver; and a barrel extension coupled to the barrel, wherein the barrel extension comprises a first lug, a second lug, a third lug, a fourth lug, an extractor gap located between the first lug and the second lug, and a feed ramp located between the third lug and the fourth lug.

2. The rotating bolt firearm of claim 1, wherein the extractor gap comprises a 90 degree portion of the barrel extension.

3. The rotating bolt firearm of claim 1, wherein the barrel extension consists of seven lugs in total.

4. The rotating bolt firearm of claim 1, further comprising an extractor, configured to be located within the extractor gap.

5. The rotating bolt firearm of claim 4, wherein the extractor comprises an extractor lug extending from a first side of the extractor, and wherein the extractor lug does not extend to a second side of the extractor.

6. The rotating bolt firearm of claim 5, wherein the barrel extension is sized for a .223 caliber barrel.

7. The rotating bolt firearm of claim 6, wherein the rotating bolt firearm is configured to fire a .308 cartridge.

8. The rotating bolt firearm of claim 6, further comprising a magazine well, wherein the magazine well has an opening of at least 2.80 inches.

9. The rotating bolt firearm of claim 8, wherein the magazine well is configured to receive a .308 cartridge.

10. The rotating bolt firearm of claim 1, wherein the barrel comprises a length of 10.5 inches.

11. The rotating bolt firearm of claim 10, wherein a weight of the rotating bolt firearm is less than 6.3 pounds.

12. The rotating bolt firearm of claim 8, wherein the magazine well comprises a finger placement notch.

13. The rotating bolt firearm of claim 1, further comprising grooves in a neck portion of a chamber of the barrel.

14. The rotating bolt firearm of claim 13, wherein the grooves are configured to facilitate extraction of a cartridge.

Description

DETAILED DESCRIPTION

[0008] The subject matter of the present disclosure is particularly pointed out and distinctly claimed in the concluding portion of the specification. A more complete understanding of the present disclosure, however, may be obtained by referring to the detailed description and claims when considered in connection with the drawing figures, wherein like numerals denote like elements.

[0009] FIG. 1A illustrates a perspective view of a rifle in a battery position, in accordance with various embodiments;

[0010] FIG. 1B illustrates a cross section view of the rifle, in accordance with various embodiments;

[0011] FIG. 1C illustrates a perspective view of the rifle in a partially out-of-battery position, in accordance with various embodiments;

[0012] FIG. 1D illustrates a cross section view of the rifle through a magazine well, in accordance with various embodiments;

[0013] FIG. 1E illustrates a barrel extension, in accordance with various embodiments;

[0014] FIG. 2A illustrates a top view of a rifle, in accordance with various embodiments;

[0015] FIG. 2B illustrates an enlarged cross section view of the rifle, in accordance with various embodiments;

[0016] FIG. 3A illustrates a perspective view of an extractor, in accordance with various embodiments; and

[0017] FIG. 3B illustrates a front view of the extractor, in accordance with various embodiments.

DETAILED DESCRIPTION

[0018] The detailed description of exemplary embodiments herein makes reference to the accompanying drawings, which show exemplary embodiments by way of illustration and their best mode. While these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the inventions, it should be understood that other embodiments may be realized and that logical, chemical and mechanical changes may be made without departing from the spirit and scope of the inventions. Thus, the detailed description herein is presented for purposes of illustration only and not of limitation.

[0019] For example, the steps recited in any of the method or process descriptions may be executed in any order and are not necessarily limited to the order presented. Furthermore, any reference to singular includes plural embodiments, and any reference to more than one component or step may include a singular embodiment or step. Also, any reference to attached, fixed, connected or the like may include permanent, removable, temporary, partial, full and/or any other possible attachment option. Additionally, any reference to without contact (or similar phrases) may also include reduced contact or minimal contact.

[0020] In the context of the present disclosure, devices, systems, and methods may find particular use in connection with rotating bolt firearms. However, various aspects of the disclosed embodiments may extend to all types of applications and to all types of firearms including, without limitation, automatic firearms, semi-automatic firearms, bolt action firearms, and/or the like. Similarly, the present disclosure may extend to firearms using any suitable action including, for example, rotating bolt firearms, and to any suitable actuation system including, for example, gas piston systems, gas impingement systems, manual actuation systems, and/or the like.

[0021] In various embodiments, and with reference to FIG. 1A through FIG. 1E, an AR 15 style rifle 100 is provided. Rifle 100 may be a rotating bolt rifle. Rifle 100 may comprise an upper receiver 120 and a lower receiver 110. Upper receiver 120 may be operatively coupled to a barrel 141 and/or barrel assembly and a rail system 150. Upper receiver 120 may also be coupled to or configured to receive a buttstock 160. Rifle 100 may be configured to fire a .308 caliber bullet. However, rifle 100 may be sized with weight and controls positioned at standard, or mil-spec locations in lower receiver 110 and/or upper receiver 120 for a .223 caliber rifle. For example safety switches, selector switches, magazine release buttons, charging handles, and/or the like may be at positions that are found on a mil spec AR 15 style rifle configured to fire a .223 Remington and/or 5.56 NATO caliber cartridges (collectively, “.223 cartridge”).

[0022] In various embodiments, rifle 100 may be configured to fire a .308 Winchester caliber bullet or cartridge (“.308 cartridge”). A .308 cartridge may comprise a total length of 2.80 inches. Moreover lower receiver 110 of rifle 100 may be configured with a magazine well 112 that is appropriately sized to receive a .308 caliber magazine configured to deploy .308 caliber cartridges to upper receiver 120. Thus, the magazine well 112 may comprise a length of greater than 2.80 inches. In various embodiments, the magazine well 112 may comprise a finger placement notch 113. The finger placement notch 113 may be recessed into a side of the magazine well forward of the trigger guard, and may provide a functional location for a user to position a finger when not on the trigger.

[0023] In various embodiments, rifle 100 may weigh less than seven pounds fully assembled. For example, rifle 100 may be complete and operational and may include, for example, upper receiver 120, lower receiver 110, buttstock 160, handle 165, rail 150, barrel 141, and/or all other components including, for example a charging handle, a bolt assembly, a drop in trigger, and/or the like. In this regard the weight of a complete and operational rifle 100 in an unloaded configuration may be less than seven pounds. Moreover, the weight of a fully operational fully assembled rifle 100 may be less than six and half pounds period. In various embodiments, the barrel 141 may be 16 inches, and the weight of the rifle 100 may be less than 6.8 pounds. In various embodiments, the barrel 141 may be 10.5 inches, and the weight of the rifle 100 may be less than 6.3 pounds.

[0024] In various embodiments, a barrel extension 142 may be coupled to a barrel 141. Barrel extension 142 may be configured to receive a cartridge within upper receiver 120. In various embodiments, barrel extension 142 may be a .223 sized barrel extension and may be configured to receive a .308 cartridge as further explained below. A portion of barrel extension 142 may be located within the upper receiver 120. Moreover, barrel extension 142 may be configured to interface with a bolt face 132 of bolt 130 to provide for battery and out of battery configurations. Barrel extension 142 may comprise a plurality of lugs including, for example lug 144-1, lug 144-2, lug 144-3, lug 144-4, lug 144-5, lug 144-6, 144-7 as shown in FIG. 1E. Thus, the barrel extension 142 may comprise seven lugs. The lugs may be located at every 45 degree location around the interior circumference of the barrel extension, except for one. In the illustrated orientation, lug 144-1 may be located at zero degrees, lug 144-2 may be located at 90 degrees, lug 144-3 may be located at 135 degrees, lug 144-4 may be located at 180 degrees, lug 144-5 may be located at 225 degrees, lug 144-6 may be located at 270 degrees, and lug 144-7 may be located at 315 degrees.

[0025] Unlike mill spec or standard barrel extensions, barrel extension 142 may comprise an extractor gap 147. The extractor gap 147 may be a 90 degree portion of the barrel extension 142 without a lug. As illustrated the extractor gap 147 is located between adjacent lugs 144-1 and 144-2, which are separated by 90 degrees (minus the width of a lug). The extractor gap 147 may be formed by removing a lug from barrel extension 142, or by forming the barrel extension 142 without a lug in one of the eight locations typically including a lug in a mil spec barrel extension. Moreover extractor gap 147 may be sized substantially wide to accommodate an extractor capable of or configured to extract the case of a .308 caliber bullet from barrel extension 142. Barrel extension 142 may be configured with a feed ramp 146. The feed ramp 146 may be configured to contact a bullet tip as the bullet is being loaded into the chamber, and guide the bullet into the chamber.

[0026] In various embodiments and with reference to FIG. 2A and FIG. 2B, a top view of rifle 200 is shown in FIG. 2A, and an enlarged cross section of rifle 200 is shown in FIG. 2B. In various embodiments, rifle 200 may be the same as rifle 100. The stroke or operational travel of rifle 200 may be sufficient to extract and/or load a .308 cartridge. In this regard the overall travel of bolt 230 within upper receiver 220 is substantially further than the travel of a bolt configured to actuate a firearm in .223 cartridge. In various embodiments, the bolt 230 may comprise a delay which slows the cycle rate of the rifle 200. Moreover, buffer system 235 may be configured within elongated stroke as compared to a mil spec rifle to facilitate the operation of rifle 200 and more specifically the travel of bolt 230 within upper receiver 220. As illustrated, the bolt 230 is located within the barrel extension 242. The rifle 200 may comprise grooves 250 in a neck portion of the chamber of the barrel, and the grooves 250 may terminate in the shoulder portion of the chamber. The grooves 250 may assist in extraction of a shell by allowing gas from a fired cartridge to enter the grooves 250 and force the cartridge in an aft direction by applying gas pressure against the shoulder of the cartridge, as well as by compressing the neck of the cartridge.

[0027] In various embodiments, lower receiver 210 may be configured differently from a mil spec lower receiver. In this regard trigger assembly 215 may be disposed aft of elongated magazine well 212 to facilitate actuation of bolt 230 in the battery position and receipt of a magazine and associated .308 cartridge.

[0028] Referring to FIGS. 3A and 3B, a perspective view, and a forward view of an extractor 300 are illustrated according to various embodiments. The extractor 300 may comprise an extractor lug 310 extending from a first side 301 of an exterior of the extractor 300 and less than a full distance across the extractor 300, such that the extractor lug 310 does not extend to the second side 302 of the extractor 300. The extractor lug 310 may be configured to be located within the extractor gap 147 illustrated in FIG. 1E.

[0029] Benefits, other advantages, and solutions to problems have been described herein with regard to specific embodiments. Furthermore, the connecting lines shown in the various figures contained herein are intended to represent exemplary functional relationships and/or physical couplings between the various elements. It should be noted that many alternative or additional functional relationships or physical connections may be present in a practical system. However, the benefits, advantages, solutions to problems, and any elements that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as critical, required, or essential features or elements of the disclosure. The scope of the disclosure is accordingly to be limited by nothing other than the appended claims, in which reference to an element in the singular is not intended to mean “one and only one” unless explicitly so stated, but rather “one or more.” Moreover, where a phrase similar to “at least one of A, B, or C” is used in the claims, it is intended that the phrase be interpreted to mean that A alone may be present in an embodiment, B alone may be present in an embodiment, C alone may be present in an embodiment, or that any combination of the elements A, B and C may be present in a single embodiment; for example, A and B, A and C, B and C, or A and B and C. Different cross-hatching is used throughout the figures to denote different parts but not necessarily to denote the same or different materials.

[0030] Methods and systems are provided herein. In the detailed description herein, references to “one embodiment”, “an embodiment”, “various embodiments”, etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described. After reading the description, it will be apparent to one skilled in the relevant art(s) how to implement the disclosure in alternative embodiments.

[0031] Furthermore, no element, component, or method step in the present disclosure is intended to be dedicated to the public regardless of whether the element, component, or method step is explicitly recited in the claims. No claim element herein is to be construed under the provisions of 35 U.S.C. 112(f) unless the element is expressly recited using the phrase “means for.” As used herein, the terms “comprises”, “comprising”, or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.