Embodiments of the disclosure are directed generally to firearms and, more particularly, to a modular, adjustable buttstock assembly for a firearm.
Most conventional firearms typically are adapted for specific tasks and generally are limited to use with specific calibers and/or types of ammunition. However, demand is increasing for firearms that can be modified to fire different types of ammunition, and/or can be reconfigured for different environments and uses. For example, in military applications today, the environments in which soldiers are forced to fight are changing such that they can be in open desert and then move into close quarters battle in a more urban area within the matter of a few hours. At the same time, their weapons needs can further change, i.e., they might be faced with need for a longer range, sniping weapon or alternatively with needs for a more standard infantry rifle depending on the environment or situation. Carrying multiple different firearms is, however, impractical as adding undue weight and bulk to soldiers' packs and gear. Also, for more specialized uses, such as for sniping and other tactical situations, the weapon must be configurable as needed to fit the shooter's particular needs and/or use in a particular combat situation.
In addition, in operation of generally all types of firearms, the force of the expanding gas propelling a bullet/shot down the barrel upon firing also will force the firearm rearwardly in a recoil action. Accordingly, most rifles, shotguns, and similar types of firearms subject to a substantial recoil typically will include a buttstock for engaging the shooter's shoulder when firing the firearm to help support the firearm during a recoil action. It is becoming increasingly desirable that the buttstocks of such firearms accommodate different morphologies, comfort preferences, and other variables of different users, as well as supporting various equipment that may be used in conjunction with the firearm. It is also desirable, however, to minimize the overall weight of a firearm in military and civilian sporting applications. In addition, changes to features of the buttstock may be required in the field. For example, a user may want to adjust features of the buttstock to accommodate changes to the optics, caliber of ammunition, and/or barrel length of the firearm. It is desirable that such changes be able to be made in the field without requiring that a user carry additional tools, and that the changes can be made quickly and easily without compromising the performance of the buttstock during recoil.
Accordingly, it can be seen that a need exists for a buttstock apparatus for firearms that addresses the foregoing and other related and unrelated problems in the art.
The present disclosure generally is related to a modular firearm comprising an adjustable, modular buttstock assembly. The buttstock assembly generally can be moveable between an extended position for placing the firearm in an operating configuration and a folded position for placing the firearm in a transport configuration. The buttstock assembly can include a frame with a central opening and at least one of a comb assembly with a cheek piece and a butt plate assembly having a recoil pad mounted to the frame by an adjustment apparatus. Each adjustment apparatus can include at least one of a guide post and a threaded adjustment post, each received in respective bores in the frame. The adjustment apparatus can include a feature that can selectively increase the friction between the frame and the guide post and adjustment post to help prevent the translation of the guide post and adjustment post in the bore in the frame. For example, a clamping mechanism, such as a toggle lock, a screw clamp apparatus, slide locking mechanism, or other releasable lock mechanism can be mounted to the frame at or proximate the bores in the frame receiving the guide post and adjustment post. In one example embodiment, the clamping mechanism can compress or clamp the bores into frictional engagement with the guide post and adjustment post, squeezing the guide post and adjustment post in the frame to secure the recoil pad and cheek piece in desired positions.
In one embodiment, the vertical position of the recoil pad further can be selectively adjusted. The butt plate assembly can include a base plate slidably coupled to a guide plate (e.g., with tongue and groove features). The guide plate, for example, can include an adjustment mechanism, such as a detent assembly that can selectively engage a notch of a series of notches in the base plate for selectively preventing or allowing vertical translation of the base plate relative to the guide plate. In one embodiment, the clamp mechanism is biased into engagement with the notch.
Features for attaching accessories to the buttstock assembly also can be mounted to the frame. For example, one or more accessory rails can be mounted to the frame via an adjustable bracket, or can be directly secured to a portion of the frame. Additionally, the frame can include features for attaching a sling swivel, or other similar features.
Those skilled in the art will appreciate the above features and advantages, as well as additional features and advantages upon reading the following detailed description with reference to the accompanying drawings and appendix.
Those skilled in the art will appreciate and understand that, according to common practice, the various features of the drawings discussed below are not necessarily drawn to scale, and that dimensions of various features and elements of the drawings may be expanded or reduced to more clearly illustrate the embodiments of the present invention described herein.
Referring now to the drawings in which like numerals indicate like parts throughout the several views, the figures illustrate example embodiments of the buttstock apparatus according to the principles of the present disclosure for use in a firearm such as a precision sniper rifle (PSR), modular sniper rifle (MSR), and/or similar types of firearms. However, it will be understood that the principles of the buttstock apparatus of the present disclosure can be used in various types of firearms including M4, M16, AR-15, SCAR, AK-47, HK416, ACR, shotguns, rifles and other long guns, hand guns, and other gas-operated semi-automatic, automatic and manually operable firearms. The illustrated embodiments, include by way of example, shows a bolt action firearm. However, the present disclosure should not be limited to the illustrated examples.
The following description is provided as an enabling teaching of exemplary embodiments, and those skilled in the relevant art will recognize that many changes can be made to the embodiments described. It also will be apparent that some of the desired benefits of the embodiments described can be obtained by selecting some of the features of the embodiments without utilizing other features. Accordingly, those skilled in the art will recognize that many modifications and adaptations to the embodiments described are possible and may even be desirable in certain circumstances, and are a part of the invention. Thus, the following description is provided as illustrative of the principles of the embodiments and not in limitation thereof.
As shown in
In the illustrated embodiment, a buttstock assembly 50 is mounted to the rear end 26 of the chassis 10 at a hinge 52.
As shown in
As shown in
As shown in
In an alternative embodiment, the bottom accessory rail 70 and/or the bracket 76 could be riveted or adhered to the frame 54 or integrally formed with the frame, and the side accessory rail 74 could be riveted or adhered to or integrally formed with the bracket 76. In another alternative embodiment, an accessory rail or other attachment feature can be secured to any surface of the frame 54, and could be provided with a variety of configurations or omitted, without departing from the disclosure.
In the illustrated embodiment, as shown in
In the illustrated embodiment, the deflection portions 112, 114 can be squeezed or clamped toward one another, pivoting at the ends of the slit 96, to reduce the width of the slit 96 and thereby reduce the diameters of one or both of the bores 102, 104. Accordingly, the frame 54 is tightened around the guide post 98 and/or the adjustment post 100 at the bores 102, 104 to help prevent translation of the guide post and/or the adjustment post relative to the frame. Relieving the clamping of the deflection portions 112, 114 will allow the guide post and/or adjustment post to translate relative to the frame so that the positioning of the comb assembly 88 and the butt plate assembly 90 can be adjusted.
In the illustrated embodiment, the throw lever assemblies 94 generally form toggle clamps mounted to or adjacent the deflection portions 112, 114, typically being oriented transverse to the slits 96. As shown in
A thumb tab or lever 128 is pivotably coupled to the head 126 of the cross pin 122 by a pivot pin 130, and a lever lock 132 is pivotably coupled to the thumb tab 128 by a pivot pin 134. The thumb tab 128 includes cam lobes 136 disposed on either side of the head 126 of the cross pin 122, and an off-center bore 138 extends through each of the cam lobes 136. The bore 138 is aligned with a bore 140 in the head 126 so that the pivot pin 130 can extend through the bores 138, 140. Accordingly, the thumb tab 128 can pivot relative to the cross pin 122 about the pivot pin 130. The cam lobes 136 include cam surfaces 142, which can engage corresponding indentations or surfaces 144 in the lever lock plate 116 so that the cam surfaces 142 can slide or pivot over the surface of the lever lock plate 116. The cam lobes 136 also generally are configured so that when the thumb tab 128 is in the release position (e.g., when the thumb tab is pivoted away from the frame 54), the pivot pin 130 is closer to the lever lock plate 116 than when the thumb tab 128 is in the lock position (e.g., when the thumb tab is disposed against the frame 54). Stated another way, the distance D1 (
As shown in
In the illustrated embodiment, the relief cuts 108, 110 are generally substantially identical in size and/or configuration, enabling the throw lever assemblies 94 to be easily reconfigured for ambidextrous use by either right- or left-handed users. Accordingly, while the throw lever assemblies 94 are assembled with the thumb tabs or levers 128 on the right side of the firearm F in
It will also be understood by those skilled in the art that the adjustment apparatus 92a, 92b can be otherwise configured and/or features thereof can be modified or omitted without departing from the disclosure. For example, the guide post 98 or the adjustment post 100 could be omitted for one or both of the adjustment apparatus 92a, 92b. While the comb assembly 88 or the butt plate assembly 90 could be supported by the respective guide post 98 alone when the guide posts 98 are clamped to the frame 54 by the throw lever assemblies 94, the adjustment posts 100 can provide additional support to the clamping of the throw lever assemblies 94 by the threaded engagement of the adjustment posts 100 with the frame 54 at the bores 104 whether the guide posts 98 are included or omitted.
In an alternative embodiment, the adjustment features 92a, 92b can include any suitable apparatus that squeezes or clamps the guide post 98 and/or the adjustment post 100 in the frame 54 or otherwise increases or protrudes a frictional engagement between the frame 54 and the guide post 98 and/or the adjustment post 100 to help prevent the guide post 98 and/or the adjustment post 100 from moving relative the frame 54. For example, a slide lock or twist lock clamping mechanism could be used in place of the throw lever assemblies 94 (
As shown in
As shown in
The base plate 166 includes a tongue feature 174 on a forward surface of the base plate, and the guide plate 170 includes a groove feature 176 on a rearward surface of the guide plate. The tongue 174 includes sloped edges 178 along the height of the base plate on either side of the tongue. Similarly, the groove 176 has sloped edges 180 along the height of the guide plate. Accordingly, the tongue 174 can be received in the groove 176 with the sloped edges 178 interfacing with the sloped edges 180 (
As shown in
In the illustrated embodiment, the adjustment button 192 can be depressed to push the clamp plate 190 against the biasing spring 196 to move the clamp pin 194 toward a non-engaging position out of the groove 176. The clamp pin 194 thereby is disengaged from the notch 188. The tongue 174 then can translate up or down in the groove 176 to reposition the base plate 166 and the recoil pad 164 relative to the guide plate 170 and the frame 54. With the recoil pad 164 in a desired position, the adjustment button 192 can be released so that the biasing spring 196 urges/moves against the clamp plate 190 so as to move the clamp pin 194 back into the groove 176, toward an engaging position for engaging and being received within one of the notches 188 of the tongue 174 of base plate 166. The movement of the clamp plate 190 will move the adjustment pin 192 in the transverse bore 200 back into the original position. In one embodiment, the clamp pin 194 can fit securely in each of the notches 188 so that the clamp assembly 186 and the notches 188 can provide smooth and easy locking and unlocking of the base plate 166 and the guide plate 170 while limiting or eliminating vertical movement of the base plate 166 relative to the guide plate 170 (e.g., slack) when the clamp assembly 186 is engaged with one of the notches 188.
In one embodiment, spacer plates (not shown) also can be added to the butt plate assembly 90 to move the recoil pad 164 further rearwardly in addition to the translation of the guide post 98 and adjustment post 100 of the adjustment apparatus 92b. The butt plate assembly 90 can be otherwise configured or omitted without departing from the disclosure.
In operation, the vertical position of the comb assembly 88 and/or the longitudinal spacing of the butt plate assembly 90 can be adjusted by releasing the throw lever assemblies 94 so that the guide post 98 and the adjustment post 100 can translate relative to the frame 54. Particularly, the actuating end 148 of the lever lock 132 can be depressed to disengage the lock end 146 of the lever lock from the notch 150 in the head 126 of the cross pin 122. The thumb tab or lever thereof 128 then can be pivoted upwardly about the pivot pin 130 and the head 126. The cam lobes 136 rotate as the thumb tab 128 is pivoted, and the cam surfaces 142 slide along the indentations 144 in the lever lock plate 116. Accordingly, the distance between the pivot pin 130 and the portions of the cams surfaces 142 in contact with the lever lock plate 116 decreases as the thumb tab 128 is pivoted to the release position. In one embodiment, the pivot pin 130 is spaced apart from the lever lock plate 116 by the distance D1 (
Once the comb assembly 88 and/or the butt plate assembly 90 has been adjusted to a desired position, the respective throw lever assembly 94 of the adjustment apparatus 92a or 92b thereof can be moved to the lock position to secure the guide post and the adjustment post. Particularly, the thumb tab 128 can be pivoted to the lock position (
In the illustrated embodiment, a latch mechanism 202 for the foldable buttstock assembly 50, can be provided, being operable to selectively enable pivoting of the buttstock assembly 50 between an extended configuration (
In an alternative embodiment, the bore in the screw nut plate 118′ can be a clearance fit with the cross screw 122′, and a nut (not shown) can engage the cross screw at the bore in the screw nut plate. The screw clamp assemblies 94′ can be easily switched so that the screw lock plate 116′ is disposed in the relief cut 110 on the left side of the firearm, the screw nut plate 118′ is disposed in the relief cut 108 on the right side of the firearm, and the cross screw 122′ is inserted into the bore 120 from the left side of the firearm. The cross screws 122′ can be configured to be tightened and loosened by a screwdriver, a hex key (e.g., hex key 162), or other tool. The screw clamp assemblies 94′ could be otherwise shaped, arranged, and/or configured without departing from the disclosure.
In operation, the vertical position of the comb assembly 88 and/or the longitudinal spacing of the butt plate assembly 90 can be adjusted by loosening the respective cross screw 122′ so that the guide post 98 and the adjustment post 100 can translate relative to the frame 54. The adjustment wheel 106 can be turned to move the adjustment post 100 inwardly or outwardly of the frame, moving the comb assembly 88 or the butt plate assembly 90 accordingly. With the comb assembly 88 and/or the butt plate assembly 90 in a desired position, the respective cross screw can be tightened (e.g., with a hex key). The tightening of the cross screw 122′ causes the head of the screw to bear against the screw lock plate 116′ as the end portion of the cross screw that is threadedly engaged with the screw nut plate 118′ urges the screw nut plate 118′ toward the screw lock plate 116′. As these clamp plates are drawn together, the deflection portions 112, 114 are urged toward one another between the screw lock plate and the screw nut plate, narrowing the slit 96 and closing/tightening the frame 54 around the guide post 98 and the adjustment post 100. Accordingly, the screw clamp assemblies 94′ help lock the guide post 98 and the adjustment post 100 in position until the cross screws 122′ are loosened.
It therefore can be seen that the construction of the firearm with an adjustable modular buttstock assembly according to the principles of the present disclosure provides a firearm with a lightweight yet highly configurable buttstock assembly while further providing for substantially quick and easy adjustment and reconfiguration of features of the buttstock assembly.
Those skilled in the art will appreciate that many modifications to the exemplary embodiments are possible without departing from the scope of the invention. In addition, it is possible to use some of the features of the embodiments described without the corresponding use of the other features. Accordingly, the foregoing description of the exemplary embodiments is provided for the purpose of illustrating the principle of the invention, and not in limitation thereof, since the scope of the invention is defined solely be the appended claims.
The present Patent Application is a divisional of U.S. patent application Ser. No. 13/573,156, filed Aug. 27, 2012, by the inventor named in the present Application. This Patent Application claims the benefit of the filing date of the United States Patent Application cited above according to the statutes and rules governing divisional patent applications, particularly 35 U.S.C. §§120 and 121 and 37 C.F.R. §1.78(d)(2) and (d)(3). The specification and drawings of the United States Patent Application referenced above are specifically incorporated herein by reference as if set forth in their entirety.
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Number | Date | Country | |
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20140360074 A1 | Dec 2014 | US |
Number | Date | Country | |
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Parent | 13573156 | Aug 2012 | US |
Child | 14466328 | US |