RU2808297C1 - Platform for mounting auxiliary devices on civilian small arms - Google Patents

Abstract

FIELD: weaponry.

SUBSTANCE: platform for mounting auxiliary devices on civilian small arms includes a lower strap adjacent to the receiver, an upper strap and a removable cover. The lower strap is attached to the barrel using an overlay located inside the rear backsight post, and has a rear part that rests against the front end of the receiver. The rear part of the lower strap has a counterpart that fits into the front end of the receiver.

EFFECT: increase in operational characteristics, eliminating direct contact of parts of the platform with the barrel of a small arms weapon.

10 cl, 1 dwg

Description

Field of technology

The invention relates to small arms, in particular to platforms (chassis) for mounting auxiliary devices on civilian small arms "Saiga", "VPO", etc., created on the basis of the Kalashnikov assault rifle (AK) of various versions and modifications.

State of the art

There are many platforms known from the prior art for attaching auxiliary devices to small arms (hereinafter referred to as SS). Additional devices usually include various optical devices (sights), handles, flashlights, etc.

From the RF patent for invention No. 2628423 (published 2017.08.16, IPC F41C 23/16) a platform for attaching additional devices to a rifle is known, containing a lower bar (forearm) with elements for attaching additional devices, an upper bar with elements for attaching additional devices, as well as a connecting coupling for attaching the lower strip and the upper strip.

The disadvantage of this solution is its complete incompatibility with Kalashnikov assault rifles (AK), various versions and modifications, as well as with Saiga and VPO carbines. In addition, the use of a coupling increases the time for mounting and dismantling the platform. Also, the known solution provides a protective removable cover, which is attached to the bottom bar using a screw connection, the disadvantage of which is the need to use special tools for its installation and dismantling, and, consequently, difficulties arise when cleaning the rifle, increasing the time for installation and dismantling. However, this protective cover does not have a rail interface system in its design, which reduces the number of possible auxiliary devices for installation on a rifle. When using the known solution in a variation without a protective removable cover, it becomes necessary to dismantle the top bar in order to remove the receiver cover and clean the rifle, since the top bar clamps the receiver cover in a vertical plane.

The platform presented in the Russian Federation patent for invention No. 2628423 was chosen as the prototype of the present invention.

Also known from the prior art are various platforms (chassis) for placing auxiliary devices on Kalashnikov assault rifles and their modifications. In particular, in US patents No. US 11248871 B2 (published on 2022.02.15), No. US 10591247 B2 (published on 2020.03.17), in Chinese patent No. CN 107356153 A (published on 2017.11.17), etc.

The platforms described in the above patents consist of three main elements, namely the upper bar, the lower bar (handguard) and the assembly of the lower bar to the machine body. The fastening unit may be a threaded ring designed to be screwed onto the machine body; adapter for attaching the forend to the machine gun, fixed to the end of the receiver and the barrel of the machine gun; rear sight post for attaching the fore-end to the machine gun, serving as an adapter. After the fastening unit is secured to the machine body, the upper and lower bars are fixed to the fastening unit. The upper rail, in turn, may have a continuation in the form of a rail interface (for example, a Picatinny rail) towards the receiver cover (see US 10591247 B2, CN 107356153 A) or such a continuation can be presented in the form of a separate structural element attached to the rack rear sight (see US 11248871 B2).

The disadvantage of the listed solutions is the use in their designs of the attachment point for the forend to the CO in the form of a separate structural element, the need to replace the standard rear sight post, and the inability to clean the weapon without dismantling the upper platform bar. In addition, the use of a rail interface not along the entire length of the CO significantly reduces the number of possible auxiliary devices for installation on the CO. The use of a large number of screw connections in known solutions increases the unreliability of their fastening on the machine body and increases the risk of possible unscrewing due to vibrations during shooting.

Disclosure of the invention

The objective of the invention is to create a universal and easy-to-use platform (chassis) for installing auxiliary devices on civilian small arms (hereinafter - GSO), created on the basis of the Kalashnikov assault rifle (AK) of various versions and modifications, eliminating the disadvantages of platforms known from the prior art, and also improve the operational characteristics of GSO; provide the ability to assemble and disassemble the GSO for cleaning without the need to dismantle the upper bar and provide the ability to attach the lower bar (forearm) to the GSO without using a separate fastening unit.

The stated problem of the invention is solved by creating a platform for mounting auxiliary devices on civilian small arms (hereinafter referred to as platform, invention, technical solution). The platform includes a lower strap adjacent to the receiver, an upper strap and a removable cover, characterized in that the lower strap is attached to the barrel using an overlay element located inside the rear sight post, and has a rear part abutting the front end of the receiver, and the rear part of the lower strap has a counterpart that fits into the front end of the receiver.

The technical result of the invention is to improve the operational characteristics of the GSO, which consists, in particular, in providing the ability to clean the GSO without the need to remove the top bar. Improving the performance characteristics also consists in providing the possibility of mounting auxiliary devices suspended relative to the shaft on the GSO, and also consists in excluding direct contact of parts of the invention with the GSO barrel, which eliminates deterioration in the operational characteristics of the GSO after installing the invention and auxiliary equipment on it. In addition, the technical result of the invention is to increase the reliability of fixing the platform to the GSO.

Achievement of the declared technical results is ensured by the essential features of the invention listed in the claims. The feasibility of achieving the technical results is explained further in view of the accompanying drawings and a description of the implementation of the invention.

Brief description of drawings

The claimed technical solution is illustrated by images:

Fig. - a platform for mounting auxiliary devices on civilian small arms.

Carrying out the invention

The present invention generally relates to a platform (chassis) for installing auxiliary devices on the GSO, created on the basis of the Kalashnikov assault rifle (AK), its various versions and modifications, including the Saiga and Vepr (VPO) carbines. The invention is a system of interconnected mechanical devices that are fixed to the GSO. The invention is compatible with all GSO based on the Kalashnikov assault rifle (AK) with a standard gas tube length similar to the versions: AKM, AK-74, AK-74M, AK-101/103/105Saiga-MK/308, VPO-133/136 and etc. in calibers 5.45×39, 5.56×45(.223Rem), 7.62×39, 7.62×51(.308Win)).

In this invention, the term “auxiliary devices” refers to various devices or accessories for the GSO. For example, accessories may include optical sights (including light red dot sights and heavy optical sights), scope attachments (such as thermal imaging or night vision attachments), tactical flashlights, bipods, auxiliary grips, underbarrel shotguns, laser designators and rangefinders, video cameras, etc.

The term "rail interface" includes Keymod, M-LOK and/or MIL-STD-1913 interfaces, Picatinny rail, Weaver rail and/or NATO accessory rail.

As shown in Fig., the platform consists of three main elements: the top bar (1), the bottom bar (2) and the removable cover (3). These elements contain a rail interface in their design.

The upper rail has a hole (14) for the standard rear sight post, which allows the use of GSO without additional sighting equipment and the need to replace the standard rear sight post. The upper part of the platform is fundamentally divided into two parts: a removable cover (3) and an upper bar (1), which makes it possible to clean or service the GSO without the need to dismantle the upper bar, and, consequently, the auxiliary devices mounted on the upper bar (2) or removable cover (3). It is enough just to remove the removable cover (3) and service the GSO. Thus, all settings of auxiliary devices are not lost after servicing, and re-shooting of the GSO is not required.

The removable cover (3), in turn, uses the standard fastening of the GSO receiver cover and does not require the use of additional fasteners, which makes the installation and dismantling process quick and easy. In this case, the removable cover (3) contains a rail interface, which allows you to increase the number of auxiliary devices possible for installation on the GSO, and also creates a single rail interface with the upper bar (1). Additionally, the removable cover contains a front sight (10), necessary for working with a standard sight. The front sight (10) is fixed with a screw, which can be unscrewed if necessary.

The lower rail (2) acts as a forend and contains a rear part (12) that rests against the front end of the receiver, and the rear part of the lower rail (12) has a counterpart (13) that fits into the front end of the receiver. This design makes it possible not to use separate attachment points for the bottom bar to the GSO in the form of a separate structural element, since the attachment point and the bottom bar in this case are a single structural element.

Also in the design of the platform there is an overhead element (17), which is installed inside the rear sight post and is intended for suspended fastening of the lower strap to the GSO. The cover element (17) in turn has four symmetrical inclined screw holes located at an angle from 30° to 60°.

The platform is a complex of fasteners, which, when assembled, have a tubular shape, placed mainly around the GSO barrel. The platform is mounted exclusively on the GSO receiver in such a way that a “free-floating” barrel is ensured, i.e. the barrel does not touch the platform and auxiliary devices. The formation of a free-floating barrel makes it possible to reduce or completely eliminate mechanical loads or compression of the GSO barrel, thereby making it possible to increase various operational characteristics of the GSO. In particular, the formation of a freely suspended barrel makes it possible to reduce temperature fluctuations and improve the repeatability of shooting.

Assembly of the platform, in general, consists of three stages. At stage “A”, the standard forend, receiver cover, gas tube and receiver lining are removed from the GSO. The overlay element (17) is installed inside the rear sight post, then the rear part of the lower strap (12) enters the front end of the receiver with the mating part (13), after which the inclined screw holes of the overlay element and the threadless holes of the lower strap are aligned with the mating part for fasteners ( 15). Fastening elements are installed (not shown in Fig.). Next, a lightweight steel gas tube (16) is installed, which is additionally fixed on the lower bar (2) by installing fasteners (9) into the holes of its stand (11). Thus, due to the fact that the lower strap is attached to the rifle receiver using an overhead element, the platform design does not touch the GSO barrel and ensures the formation of a freely hanging barrel, which gives the above-described advantages of reducing loads on the barrel and improving performance characteristics. Due to the inclination of the symmetrical screw holes of the overlay element and the symmetrical threadless holes with the mating part for fasteners (15) at an angle from 30° to 60°, uniform compression of the GSO barrel and reliable fastening of the platform is ensured. Due to the presence of symmetrical threadless holes with a mating part for fasteners (15), the fasteners rest against the provided mating part, which provides a more convenient and controlled installation process, and also reduces the risk of overtightening the fasteners.

Additionally, the mating part (13) may have a threaded hole (not shown in Fig.). In this case, the rear part of the lower strap enters the front end of the receiver with a mating part (13), which in turn is fixed with a screw from bottom to top, i.e. the screw passes through the hole in the lower part of the receiver (not shown in Fig.) and its head rests against the lower part of the receiver, respectively, which allows you to additionally fix the lower strap. For example, the Saiga-308 carbine has a standard hole in the lower part of the receiver, and when using the invention with another GSO, this hole is drilled.

At stage “B” of platform assembly, the upper strap (1) is fixed on the GSO receiver. As shown in Fig., the top bar (1) is equipped with a hole (14) for a standard rear sight post. The gas tube lock (5) rises up, and the upper strap (1) is put on the standard rear sight post, after which it is secured with fasteners (4) and (8) to the lower strap (2) in the corresponding holes. The gas tube lock (5) moves down and additionally fixes the upper bar (1), eliminating the possibility of vertical movements, which directly affects the reliability of the fastening. With this implementation, the upper bar (1) of the platform is attached to the GSO in such a way as not to touch the trunk, which also ensures the formation of a freely hanging trunk.

At stage “B” of platform assembly, a removable cover (3) is installed in the mating part of the upper bar (6) and fixed with the rear part of the return spring (7). This implementation ensures high rigidity of the fastening, absence of backlash, swaying and bouncing in the longitudinal and transverse directions, ensuring stability of orientation and high shooting accuracy for a long time. At the same time, the process of installing and dismantling the removable cover is easy and quick and does not require the use of special tools.

The platform is fastened without interfering with the design of the weapon, it is light, reliable and fast, and does not require the use of a separate fastening unit. At the same time, a “free-hanging” barrel is provided, a single rail interface of the top bar (1) and a removable cover (3) and the ability to clean the GSO without the need to remove the top bar.

Claims (10)

1. A platform for mounting auxiliary devices on civilian small arms (GSO), containing a lower strap adjacent to the receiver, an upper strap and a removable cover, characterized in that the lower strap is attached to the barrel using an overlay element located inside the rear sight post, and has a rear part that rests against the front end of the receiver, and the rear part of the lower rail has a counterpart that fits into the front end of the receiver. 2. Platform for mounting auxiliary devices on the GSO item 1, characterized in that the lower bar contains inclined screw holes at an angle from 30 to 60°. 3. Platform for mounting auxiliary devices on the GSO according to claim 1, characterized in that the bottom bar contains threadless holes with a mating part for fasteners. 4. Platform for attaching auxiliary devices to the GSO according to claim 1, characterized in that the mating part has a threaded hole for attachment to the lower part of the receiver. 5. Platform for mounting auxiliary devices on the GSO according to claim 2, characterized in that the overhead element contains inclined screw holes at an angle from 30 to 60°. 6. Platform for mounting auxiliary devices on the GSO according to claim 1, characterized in that the top bar contains a hole for a standard rear sight post. 7. Platform for mounting auxiliary devices on the GSO according to claim 1, characterized in that the upper bar contains a mating part, which includes a removable cover. 8. Platform for mounting auxiliary devices on the GSO according to claim 1, characterized in that the upper bar is additionally fixed with a gas tube closure. 9. Platform for mounting auxiliary devices on the GSO according to claim 1, characterized in that the removable cover is fixed by the rear part of the return spring. 10. Platform for mounting auxiliary devices on the GSO according to claim 1, characterized in that it contains a lightweight steel gas tube, which is additionally fixed on the bottom bar by installing fasteners into the holes of its rack.