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allow it to be indexed to the accessory as well as to the KeyMod slot. This eliminates the need to align the nuts to the holes prior to accessory installation. In most accessories, the screw is swaged after assembly to ensure that it cannot be backed out of the nut. This prevents loss of small parts (screws, nuts or other small parts used in the assembly of the accessory). The spacing of the holes is critical and is based on
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short collaboration, during which Todd
Krawczyk of Noveske Rifleworks suggested an improvement to the accessory lock/anti-rotation nut, John Noveske decided to adopt what became the KeyMod system for the NSR series of hand guards and accessories. Kincel's design was developed simultaneously, but without knowledge of the independently developed keyhole slot system by
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KeyMod is an open-source design released for use and distribution in the public domain in an effort to standardize universal attachment systems in the firearm accessories market. The KeyMod system is intended to be used as a direct attachment method for firearm accessories such as flashlight mounts,
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The goal is to eliminate the need for the rail to be fully outfitted with 1913 rails covering the entire handguard. The KeyMod system allows a user to place MIL-STD-1913 rails wherever needed, even in the 45° positions at times. The KeyMod system consists of two parts: the KeyMod slot and the KeyMod
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The KeyMod specifications call out a "recoil lug" on the accessories, which is intended to interface with the larger through hole portion and resist slippage of accessories during counter-recoil. The combination of the angled interface of the nut to the KeyMod slot and the recoil lug to the through
208:
VLTOR Weapon
Systems had previously pursued a design which was the basis for the KeyMod system. While developing the first prototype systems, Eric Kincel of VLTOR Weapon systems was approached by John Noveske of Noveske Rifleworks with a design for a universal accessory attachment system. After a
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in the public domain for adoption by the entire firearms accessory industry. The name "KeyMod" was coined by Eric Kincel (then working for VLTOR Weapon
Systems) following the naming trend of other VLTOR accessories with the suffix "Mod" meaning modular, and "Key" being a reference to the key-hole
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The specifications for the KeyMod system were initially released by VLTOR Weapon
Systems as an open-source set of drawings. As such, some manufacturers have added their own variations to the system, such as using the through-hole portion as a sling-swivel attachment point. The critical interface
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The nut is stepped, and the larger diameter end is chamfered around 270 degrees of its diameter. The angled face created is meant to interface with the chamfer on the backside of the KeyMod slot. The full diameter is left intact to create two flats on the nut which align the nut to the slot, and
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dimensions, however, still follow the specifications. In an effort to ensure interface dimensions are kept consistent and repeatable, Bravo
Company MFG released a set of drawings for KeyMod gauges that allow for expedient inspection of the 100° chamfer feature in January 2014.
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nut. The slot is distinctive with a larger diameter through-hole combined with a narrow slot. The slot is chamfered on the backside, while the through hole is sized for clearance of a quick-detach sling swivel (approximately 3/8" diameter).
373:(MIL-STD-1913), improved and standardized version of the Weaver mount. Used both for scope mounts and for accessories (such as extra sling mounts, vertical grips, bipods etc.). Major popularity in the civilian market.
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hole make for a very strong attachment point which will not slip under harsh recoil or counter recoil. It also provides for an excellent return-to-zero when removed and re-installed.
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is a universal interface system for firearm accessory components. The concept was first created by VLTOR Weapon
Systems of Tucson, Arizona, and released through
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The specifications for the KeyMod system were first published in July 2012. The current revision was released in
October 2012.
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greatly outperformed KeyMod in repeatability, drop testing and failure load testing.
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indicated that, while comparable in endurance and rough handling testing,
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spacing to allow the greatest modularity with existing accessories.
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520:(Press release). Eric S. Kincel, Vltor Weapon Systems. 25 July 2012
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467:"Mod Squad: Is KeyMod the New Industry Forend Standard?"
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Zbroyar Z-15 rifle with KeyMod slots on the handguard.
541:"KeyMod™ vs. M-LOK™ Modular Rail System Comparison"
46:. Unsourced material may be challenged and removed.
219:In 2017, a summary report of testing conducted by
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195:of Grants Pass, Oregon, before being published
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391:- free licensed competing standard to KeyMod
444:"Fad or the Future? The KeyMod Rail System"
379:- further development from the MIL-STD-1913
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578:Gun Digest Guide to Customizing Your AR-15
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106:Learn how and when to remove this message
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576:Muramatsu, Kevin (25 November 2014).
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518:"Introducing the Vltor KeyMod system"
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442:Wiley, Suzanne (17 September 2013).
397:, a ringless scope mounting standard
44:adding citations to reliable sources
15:
419:. Militarytimes.com. Archived from
417:"VLTOR gives the keymod tdp to you"
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736:Compact and non-magnifying sights
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14:
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465:Fortier, David (8 October 2014).
330:KeyMod nut/screw assembly details
557:from the original on 18 May 2017
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200:profile of the mounting slots.
31:needs additional citations for
621:accessories mounting standards
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708:(1 inch, 30 mm, 34 mm, etc.)
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539:McGee, Caleb (4 May 2017).
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641:Quick-change barrel system
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148:Place of origin
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318:KeyMod accessory details
272:Technical specifications
493:"Noveske NSR Handguard"
359:Rail Integration System
240:laser modules, sights,
712:Traditional prism rail
256:
211:Accuracy International
446:. cheaperthandirt.com
254:
940:Mechanical standards
40:improve this article
580:. Gun Digest Books.
471:rifleshootermag.com
423:on 26 February 2014
377:NATO Accessory Rail
294:KeyMod Slot details
935:Firearm components
548:thefirearmblog.com
306:KeyMod nut details
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193:Noveske Rifleworks
158:Production history
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365:Weaver rail mount
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143:Attachment System
118:Attachment System
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125:KeyMod System
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51:Find sources:
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29:This article
27:
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18:
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698:scope mounts
577:
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559:. Retrieved
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522:. Retrieved
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500:. Retrieved
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491:Chin, Cass.
486:
474:. Retrieved
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448:. Retrieved
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425:. Retrieved
421:the original
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342:Complete PDF
275:
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262:MIL-STD-1913
258:
246:
242:scope mounts
238:
218:
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197:open sourced
188:
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182:2012–present
102:
96:January 2022
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38:Please help
33:verification
30:
902:Swivel stud
864:Swivel stud
804:accessories
744:holographic
706:Ring mounts
476:20 February
450:20 February
235:Description
166:Eric Kincel
929:Categories
907:Snap hooks
717:Zeiss rail
524:23 January
402:References
395:Zeiss rail
221:NSWC-Crane
66:newspapers
874:Versa Pod
869:Picatinny
816:Picatinny
802:Handguard
669:Picatinny
656:Receivers
174:2011–2012
552:Archived
383:UIT rail
353:See also
179:Produced
171:Designed
163:Designer
55:"KeyMod"
767:RMR/SRO
628:Barrels
619:Firearm
561:3 March
502:9 April
427:9 April
225:USSOCOM
204:History
80:scholar
894:Slings
856:Bipods
836:KeyMod
811:Weaver
787:CompM4
772:C-More
762:Docter
740:reflex
694:Scopes
664:Weaver
189:KeyMod
82:
75:
68:
61:
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879:M-LOK
841:M-LOK
792:Micro
748:prism
555:(PDF)
544:(PDF)
389:M-LOK
229:M-LOK
87:JSTOR
73:books
884:ARCA
846:ARCA
821:NATO
757:Acro
696:and
674:NATO
563:2024
526:2015
504:2013
478:2015
452:2015
429:2013
223:for
140:Type
59:news
831:UIT
826:RIS
782:MOS
746:or
42:by
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103:(
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94:(
84:·
77:·
70:·
63:·
36:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
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