USRE45185E1 - Rifle handguard system with integrated barrel nut - Google Patents
Rifle handguard system with integrated barrel nut Download PDFInfo
- Publication number
- USRE45185E1 USRE45185E1 US11/361,036 US36103606A USRE45185E US RE45185 E1 USRE45185 E1 US RE45185E1 US 36103606 A US36103606 A US 36103606A US RE45185 E USRE45185 E US RE45185E
- Authority
- US
- United States
- Prior art keywords
- handguard
- barrel
- rail
- receiver
- barrel nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000010304 firing Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G11/00—Details of sighting or aiming apparatus; Accessories
- F41G11/001—Means for mounting tubular or beam shaped sighting or aiming devices on firearms
- F41G11/003—Mountings with a dove tail element, e.g. "Picatinny rail systems"
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
- F41A21/48—Barrel mounting means, e.g. releasable mountings for replaceable barrels
- F41A21/482—Barrel mounting means, e.g. releasable mountings for replaceable barrels using continuous threads on the barrel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
- F41C23/00—Butts; Butt plates; Stocks
- F41C23/16—Forestocks; Handgrips; Hand guards
Definitions
- This invention relates to rifle accessories.
- the present invention relates to handguards for rifles.
- Rifles due to their length, are typically fired using two hands. One hand is placed proximate the trigger assembly and the other is typically placed down the barrel from the trigger assembly.
- Rifles conventionally include a stock fabricated of wood. The stock typically includes a fore stock which extends some distance down the barrel. The fore stock is grasped by the shooter to provide balance and facilitate aiming the rifle. The shooter's hand is protected from the heat of the barrel during firing by the fore stock. Many modern rifles often employ synthetic materials for the stock, and still employ a fore stock. Other rifles do not include a single stock, but have a receiver to which a butt stock and a barrel are attached. The hand of a shooter is protected from the barrel by a handguard attached to the barrel. The M16 with its various permutations is an example of this type of rifle.
- a handguard In an M16, a handguard consists of an upper and a lower handguard fitted around the barrel and attached thereto at both ends. While effective for protecting the hand of a shooter, pressure on and from the handguard can cause minor flexing of the barrel. Flexing or distortion of the barrel can cause sighting problems and bullet deflections, each of which is detrimental to accuracy. Additionally, multiple parts are required for attachment of the handguard, increasing complexity, cost and difficulty of attachment.
- Another object of the invention is to provide a handguard system which can be employed on existing rifles.
- Another object of the invention is to provide a handguard system that is easily installed and aligned.
- Yet another object of the invention is to provide a handguard system which will improve accuracy.
- a handguard system for use on a rifle having a barrel and a receiver.
- the hand guard system includes a barrel nut having an inner surface with a threaded portion adapted to threadably engage the receiver for securing the barrel to the receiver and an outer surface, and a tubular handguard having an end.
- the tubular handguard is receivable about the barrel and is received about the barrel nut, engaging the outer surface thereof.
- an extension rail coupled to the handguard.
- the extension rail includes a receiver portion extending beyond the handguard, a dovetail groove formed in an underside of the receiver portion of the extension rail having a cross-sectional shape substantially identical to a cross-sectional shape of the rail on the receiver, for receipt of the rail therein, and fastening members for fastening the extension rail to the rail.
- a portion of the tubular handguard underlying the extension rail is removed to form a channel therebetween.
- FIG. 1 is an exploded perspective view illustrating an a conventional upper receiver and barrel assembly of an M16A2 rifle
- FIG. 2 is a exploded perspective view of the rifle of FIG; 1 with portions of the barrel and upper receiver illustrated, showing the conventional handguard replaced by a handguard system according to the present invention;
- FIG. 3 is an exploded perspective view of the handguard system and the integrated barrel nut according to the present invention.
- FIG. 4 is an end view of the integrated barrel nut of the handguard system of FIGS. 2 and 3 ;
- FIG. 5 is a side view of the integrated barrel nut of FIG. 4 , with a portion 5 - 5 cut away;
- FIG. 6 is a partially exploded side view illustrating a portion of a rifle with the handguard system according to the present invention.
- FIG. 7 is an exploded side plan view of the handguard and extension rail of the present invention.
- FIG. 8 is a top plan view of the handguard of the present invention.
- FIG. 9 is an end view of the handguard and extension rail of the present invention.
- FIG. 1 is a partial exploded view of a rifle 10 of the type referred to as an M16A2, illustrating an upper receiver 11 , a barrel 12 and a handguard system 14 .
- Barrel 12 has a base end 18 and a muzzle end 19 .
- Handguard system 14 is used to cover barrel 12 intermediate base end 18 and muzzle end 19 to provide a comfortable grip and to provide protection for a shooter's hand from the heat of barrel 12 during firing.
- Base end 18 of barrel 12 is attached to upper receiver 11 by a barrel nut 20 .
- a spring loaded delta ring 22 fits over barrel nut 20 and is part of handguard system 14 for retaining an upper handguard 23 and a lower hand guard 24 .
- Delta ring 22 is biased forwardly, toward muzzle end 19 of barrel 12 by a spring 26 and retaining ring 27 .
- a front sight assembly 28 is fixed to barrel 12 proximate muzzle end 19 and includes a tube cap 30 .
- the grip halves are fitted between delta ring 22 and tube cap 30 . Insertion and removal is accomplished by forcing delta ring 22 rearwardly, against the bias, increasing the separation between delta ring 22 and tube cap 30 . Ends of upper handguard 23 and lower hand guard 24 are inserted into delta ring 22 , and the opposing ends are received by tube cap 30 .
- Delta ring 22 is then permitted to return to the normal forward position, securing upper handguard 23 and lower hand guard 24 .
- a gas tube 32 extends along barrel 12 between an operating mechanism carried by upper receiver 11 and tube cap 30 . Gas tube 32 extracts gas from barrel 12 during firing and redirects it back to the operating mechanism.
- Rifle 40 is illustrated as an M16A3, but it will be understood that other rifles similar to that described above can be modified with a handguard system according to the present invention, generally designated 50 .
- a portion of an upper receiver 42 is illustrated with a barrel 43 having a base end 44 received by a barrel receiving receptacle 45 of upper receiver 42 .
- a flange 47 extends around the outer circumference of barrel 43 proximate base end 44 of barrel 43 and abuts barrel receiving receptacle 45 when base end 44 is inserted into upper receiver 42 .
- An alignment pin 48 extends from barrel 43 proximate flange 47 to facilitate proper alignment of barrel 43 when base end 44 is inserted into upper receiver 42 .
- an integrated barrel nut 52 is threaded onto barrel receiving receptacle 45 of upper receiver 42 and engages flange 47 , securely holding barrel 43 in position.
- integrated barrel nut 52 includes an inner surface having a threaded portion 53 and a reduced portion 54 separated by a shoulder 55 .
- Reduced portion 54 has a diameter smaller than the diameter of threaded portion 53 and flange 47 , but sufficient to allow passage of barrel 43 therethrough.
- Threaded portion 53 is adapted to threadably engage barrel receiving receptacle 45 , with shoulder 55 engaging flange 47 .
- integrated barrel nut 52 fastens barrel 43 to upper receiver 42 with shoulder 55 holding flange 47 against barrel receiving receptacle 45 .
- integrated barrel nut 52 further includes an outer surface 57 having an outer diameter.
- integrated barrel nut 52 further includes an outer surface 57 having an outer diameter.
- Parallel passage 58 extend longitudinally through integrated barrel nut 52 intermediate the inner surface and outer surface 57 , and are formed entirely about the circumference thereof. Passages 58 provide space through which an operating tube or push rod 59 passes. Since integrated barrel nut 52 must be threaded onto upper receiver 42 , the plurality of passages 58 insures one will align properly.
- a tubular handguard 60 is received about barrel 43 .
- Handguard 60 has an end 65 defining an inner diameter slightly larger than the outer diameter of integrated barrel nut 52 .
- End 65 is received about outer surface 57 of integrated barrel nut 52 and secured thereto by a rail extension which will be described presently, by a plurality of fasteners such as headed screws extending through apertures formed in handguard 60 , or both.
- Handguard 60 is attached such that it is spaced from barrel 43 and attached only at integrated barrel nut 52 . In this manner, a handguard is provided which is attached only at end 65 and thus will not deflect or put pressure on the barrel.
- handguard system 50 preferably includes a rail extension generally designated 70 .
- Upper receiver 42 includes a rail portion 71 on an upper surface.
- Rail portion 71 is employed for the attachment of various accessories such as sights, scopes, etc. Often, however, the existing rail on upper receiver 42 is too short for many purposes.
- extension, rail 70 can be employed to extend the rail down barrel 43 along handguard 60 .
- Extension rail 70 is fastened to the top of cylindrical handguard 60 with a receiver portion 72 extending outwardly past end 65 .
- Extension rail 70 can be fastened to handguard 60 in many diverse ways, but a preferred method will be described presently.
- receiver portion 72 of extension rail 70 is fitted over rail 71 .
- Receiver portion 72 of extension rail 70 is formed with an underside defining a dovetail slot 80 .
- Slot 80 is shaped to receive rail 71 therein.
- Receiver portion 72 of extension rail 70 is preferably of a length substantially identical to or shorter than the length of rail 71 . In this manner, when handguard 60 is correctly positioned, receiver portion 72 of extension rail 70 substantially covers rail 71 .
- receiver portion 72 is shorter than rail 71 , a portion of rail 71 is exposed for attachment of accessory devices.
- Receiver portion 72 of extension rail 70 is fastened to rail 71 with set screws 82 extending through apertures 83 and engaging the top of rail 71 .
- Receiver portion 72 of extension rail 70 aligns with rail 71 such that apertures 83 overlie grooves or notches formed in rail 71 .
- Set screws 82 extend through apertures 83 and into the notches of rail 71 preventing longitudinal movement thereof. While extending the rail, extension rail 70 additionally acts to reinforce and help stabilize handguard 60 .
- Set screws 82 extend through the top of extension rail 70 and engage the top of rail 71 . Thus, when tightened, set screws 82 force rail 70 from rail 71 securely engaging the dovetail equally on both sides.
- handguard 60 includes space 90 extending longitudinally along an upper surface thereof. Opposing sides of Space 90 are intermittently connected by bridges 92 , each having an aperture 93 . Extension rail 70 is coupled to handguard 60 with screws 94 extending concurrently through apertures 95 formed therein and apertures 93 . Once securely positioned, rail 70 is welded to handguard 60 . Screws 94 are removed and bridges 92 are cut from the edges of space 90 and also removed. Referring now to FIG. 9 , by removing bridges 92 , a channel 98 is formed along handguard 60 and extension rail 70 which provides the space necessary for the operation of the push rod system.
Abstract
Description
Claims (25)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/361,036 USRE45185E1 (en) | 2002-03-25 | 2006-02-23 | Rifle handguard system with integrated barrel nut |
US12/870,838 US20110016762A1 (en) | 2006-02-23 | 2010-08-29 | Rifle handguard system with integrated barrel nut |
US14/588,519 US20150135572A1 (en) | 2002-03-25 | 2015-01-02 | Rifle handguard system with integrated barrel nut |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/105,700 US6694660B1 (en) | 2002-03-25 | 2002-03-25 | Rifle handguard system with integrated barrel nut |
US11/361,036 USRE45185E1 (en) | 2002-03-25 | 2006-02-23 | Rifle handguard system with integrated barrel nut |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/105,700 Reissue US6694660B1 (en) | 2002-03-25 | 2002-03-25 | Rifle handguard system with integrated barrel nut |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/870,838 Continuation US20110016762A1 (en) | 2006-02-23 | 2010-08-29 | Rifle handguard system with integrated barrel nut |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE45185E1 true USRE45185E1 (en) | 2014-10-14 |
Family
ID=31494001
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/105,700 Ceased US6694660B1 (en) | 2002-03-25 | 2002-03-25 | Rifle handguard system with integrated barrel nut |
US11/361,036 Expired - Lifetime USRE45185E1 (en) | 2002-03-25 | 2006-02-23 | Rifle handguard system with integrated barrel nut |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/105,700 Ceased US6694660B1 (en) | 2002-03-25 | 2002-03-25 | Rifle handguard system with integrated barrel nut |
Country Status (1)
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US (2) | US6694660B1 (en) |
Cited By (4)
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US9851176B2 (en) | 2016-02-01 | 2017-12-26 | Tactical Assault Grips, LLC | Rail-mounted firearm handgrip assembly |
US10401122B2 (en) | 2017-06-08 | 2019-09-03 | Springfield, Inc. | Free floating handguard anchoring system |
USD923129S1 (en) | 2017-06-08 | 2021-06-22 | Springfield, Inc. | Free floating handguard anchoring system |
US20230135474A1 (en) * | 2021-04-05 | 2023-05-04 | GBRS Group | Systems and Methods for Multi-Accessory Mount Assembly for a Firearm |
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US6694660B1 (en) | 2002-03-25 | 2004-02-24 | Robert B. Davies | Rifle handguard system with integrated barrel nut |
US6848351B1 (en) * | 2002-05-07 | 2005-02-01 | Robert B. Davies | Rifle |
CA2485710C (en) | 2002-05-10 | 2011-04-19 | Karl R. Lewis | Monolithic rail platform and bolt assemblies for a firearm |
DE10229847B3 (en) * | 2002-07-03 | 2004-01-08 | Heckler & Koch Gmbh | machine gun |
DE20302344U1 (en) * | 2003-02-13 | 2003-04-24 | Heckler & Koch Gmbh | Cover cap for a handgun mounting rail |
KR100671586B1 (en) * | 2003-03-27 | 2007-01-19 | 헤클러 운트 코흐 게엠베하 | Adapter |
US8051595B2 (en) | 2004-06-16 | 2011-11-08 | Colt Defense, Llc | Automatic or semi-automatic rifle |
US7131228B2 (en) * | 2004-06-16 | 2006-11-07 | Colt Defense Llc | Modular firearm |
US8069604B2 (en) * | 2004-07-29 | 2011-12-06 | Larue Mark C | Hand-guard / barrel nut clamp assembly for tactical firearm |
US7707762B1 (en) * | 2005-01-05 | 2010-05-04 | Swan Richard E | Modular integrated rail assembly for firearms |
US8276304B2 (en) * | 2005-01-18 | 2012-10-02 | Samson Scott W | Modular fore-end rail assembly for firearms |
US7669359B2 (en) * | 2005-06-22 | 2010-03-02 | Surefire, Llc | Machine gun accessory mount adapter |
US7523580B1 (en) | 2005-11-07 | 2009-04-28 | Jerome Benedict Tankersley | Handguard system integrated to a firearm |
DE102005054917A1 (en) * | 2005-11-17 | 2007-05-24 | Heckler & Koch Gmbh | Handguard arrangement, barrel arrangement and weapon |
US7716865B2 (en) * | 2006-05-24 | 2010-05-18 | Daniel Defense, Inc. | Systems and methods for providing a hand guard and accessory mounting device for a firearm |
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US9279638B2 (en) * | 2013-05-24 | 2016-03-08 | Knight's Armament Company | Rifle forend with integrated barrel nut |
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GB0720620D0 (en) | 2006-08-04 | 2007-11-28 | Zen Design Group Ltd | No title |
-
2002
- 2002-03-25 US US10/105,700 patent/US6694660B1/en not_active Ceased
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2006
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US9851176B2 (en) | 2016-02-01 | 2017-12-26 | Tactical Assault Grips, LLC | Rail-mounted firearm handgrip assembly |
US10401122B2 (en) | 2017-06-08 | 2019-09-03 | Springfield, Inc. | Free floating handguard anchoring system |
US10712123B2 (en) | 2017-06-08 | 2020-07-14 | Springfield, Inc. | Free floating handguard anchoring system |
USD923129S1 (en) | 2017-06-08 | 2021-06-22 | Springfield, Inc. | Free floating handguard anchoring system |
US11131525B2 (en) | 2017-06-08 | 2021-09-28 | Springfield, Inc. | Free floating handguard anchoring system |
US11740051B2 (en) | 2017-06-08 | 2023-08-29 | Springfield, Inc. | Free floating handguard anchoring system |
US20230135474A1 (en) * | 2021-04-05 | 2023-05-04 | GBRS Group | Systems and Methods for Multi-Accessory Mount Assembly for a Firearm |
US11733004B2 (en) * | 2021-04-05 | 2023-08-22 | Gbrs Group Llc | Systems and methods for multi-accessory mount assembly for a firearm |
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