168:
331:
259:
110:
759:
301:
418:
615:
606:
485:
631:
36:
747:
407:
432:, and thus manufacturers must acquire a license from Magpul before making products using the M-LOK standard. Magpul claims this gives them more control in assuring that all M-LOK products are made to specifications ensuring compatibility. Program participation is open to any interested manufacturer.
570:
The tool required for mounting, in addition to the thread size, also depends the screw head type. Hex keys are used extensively in the firearms industry, but metric and imperial hex keys as a general rule are not compatible. It is possible to damage the tool and screw by selecting a tool that is too
230:
The M-LOK system can be seen as an evolution of the Magpul
Original Equipment (MOE) system, but the two are not fully compatible. Though newer M-LOK accessories can be used on older MOE slot handguards if an adaptor plate is used, there is no adaptor available for using older MOE accessories on the
389:
Block II by introducing additional component improvements. First fielded in the same year, the main improvements are the lighter
Geissele Mark 16 free-float rail that incorporates M-LOK as the mounting method and a Daniel Defense cold hammer-forged barrel that returns to the lighter "government"
470:
20 mm (0.79 in) length intervals, and accessories can be mounted either within a slot or bridging between slots, making it possible to adjust the position of accessories in smaller intervals than the length of the slot. The slots on an M-Lok handguard are approximately 32 mm
563:, which respectively have major thread diameters of 0.1640 inches and 0.1900 inches (4.166-0.794 mm and 4.826-1.058 mm expressed in metric designation). Many M-LOK screws on the international market instead use either M4 or M5
243:). Magpul released the MOE slot system in 2008 as a feature on their MOE handguards, and at the same time compatible accessories such as Picatinny rail sections, direct MOE mounted light mounts, grips, bipod studs, etc. were released.
222:
with accessories & gadgets mounted only where needed, Whereas a
Picatinny handguard typically will have whole length rail slots, resulting in heavier weight, bulkier handguard with sharp edges not user friendly, and poorer
246:
The MOE slot standard was never officially released, and a drawback to the system was that the rear side of the panel had to be accessed in order to mount accessories, limiting its application. The MOE slot system uses a
961:"This essential meaning matches that of “open” with respect to software as in the Open Source Definition and is synonymous with “free” or “libre” as in the Free Software Definition and Definition of Free Cultural Works."
626:
269:
Acknowledging shortcomings of the MOE systems, Magpul drafted M-LOK as a new and improved mounting standard which was released in 2014 replacing the existing MOE slot. The M-LOK rail specification included
1132:
571:
small for the fastener, which can be done by using an imperial tool on a metric fastener, or the converse. An exception to this is 4 mm hex keys, which are almost the exact same size as
758:
471:(1.260 in) long and 7 mm (0.276 in) wide and space 8 mm (0.315 in) from each other. The radius of the corners is approximately 2.38 mm (0.094 in).
255:
handguards. Also, depending on the accessory item, the spacing increments between the MOE slots were not small or uniform enough to adjust the desired placement of accessories.
1125:
908:
374:
indicated that, while comparable in endurance and rough handling testing, M-LOK greatly outperformed Keymod in repeatability, drop testing and failure load testing.
1118:
382:
367:
733:
371:
347:
211:
in some applications. Compared to the
Picatinny rail system, both M-LOK and KeyMod enable the user to have a slimmer, lighter, smoother and more
591: in) hex keys preferred for consumer products because end users can successfully use an imperial key on a metric fastener, and vice versa.
1041:
1084:
351:
200:
M-LOK allows for direct accessory attachment onto the "negative space" (hollow slot) mounting points, and is a competing standard to VLTOR's
239:
A prototype of the MOE slot was revealed by Magpul in late 2007 together with their Masada
Concept Rifle (which would later be known as the
395:
251:
which has to be placed manually on the inside of the handguard before mounting, making the slot system unsuited for applications such as
439:. The computer "free license" refers to a freedom to use, while Magpul only conditionally offers the license for free (analogous to a
729:
524:
343:
167:
83:
737:
65:
46:
506:
391:
286:, making it suited for applications on free-floating handguards. It was designed to work with both metal and polymer parts.
897:
1455:
794:, and for accessories (such as extra sling mounts, vertical grips, bipods etc.) Major popularity in the civilian market.
355:
1460:
884:
728:
While screw and slot dimensions are available on the web, the T-slot nut dimensions are currently under review by the
212:
330:
440:
855:
746:
1434:
1266:
972:
258:
61:
390:
profile contour as well as a mid-length gas system. Used on the M4A1 carbines by ASOC then MK18 URG-I variant
933:
1348:
797:
564:
560:
495:
410:
190:
502:
1429:
1163:
453:
featuring M-LOK rails on the handguard to better meet civilian market preferences in the United States.
262:
240:
311:
In 2017, several companies produce M-LOK handguards as well as accessories like
Picatinny rail strips,
843:
283:
252:
1048:
559:
Attachment screws made by many U.S. manufacturers are often either #8-32 TPI or 10-24 TPI
435:
Note that although Magpul describes the license as a "free license", the meaning does not match the
1343:
1196:
1178:
781:
1092:
1016:
294:
1072:
994:
764:
M-LOK approximate slot dimensions. (Primary measurements in millimeters, inches in parentheses.)
449:
NATO standards conform military issued assault rifles like the CAR 816 have semi-automatic only
109:
1424:
1386:
1333:
1186:
817:
552:
1.7 Nâ‹…m (15 lbâ‹…in) for attaching polymer or metal accessories to polymer handguards.
422:
312:
300:
194:
172:
143:
1416:
1216:
1206:
1168:
417:
320:
219:
466:
The slot dimensions (used on handguards, etc.) are available on the web. The slots provide
1110:
790:(MIL-STD-1913)—improved and standardized version of the Weaver mount. Used for both for
1391:
1338:
1191:
1158:
787:
324:
275:
208:
57:
614:
605:
421:
A STNGR USA 15 in (381 mm) HWK M-LOK handguard on a civilian semi-automatic
1449:
1262:
1201:
820:—early system used for scope mounts, still has some popularity in the civilian market
467:
271:
128:
555:
1.7 Nâ‹…m (15 lbâ‹…in) for attaching polymer accessories to metal handguards.
436:
549:
4.0 Nâ‹…m (35 lbâ‹…in) for attaching metal accessories to metal handguards.
1406:
1368:
1314:
1309:
1304:
1299:
1294:
1289:
1284:
1279:
1270:
1228:
1220:
814:—an older standard used for mounting slings particularly on competition firearms
791:
630:
484:
429:
290:
201:
1249:
1244:
1239:
1234:
1150:
844:
KeyMod vs. M-Lok: The Next AR Rail
Standard by Chris Baker, November, 19, 2014
823:
538:
359:
335:
279:
224:
1396:
1324:
339:
215:
293:
developed and released the
Modular Rail Rifle (MRR) that uses a monolithic
778:—competing standard open standard design to M-LOK for mounting accessories
385:(USASOC) program to further improve the durability and reliability of the
1353:
811:
443:
248:
406:
1141:
956:
801:
509: in this section. Unsourced material may be challenged and removed.
450:
187:
1358:
934:"M-LOK Licensing Contact and Licensed Product Information Sheet 2019"
863:
806:
775:
581: in (3.97 mm). In many industries, this makes 4.0 mm (
542:
386:
304:
204:
197:. The license is free-of-charge, but subject to an approval process.
17:
1378:
416:
405:
329:
316:
299:
257:
166:
625:
1114:
800:—generic term for a system for attaching accessories to small
478:
437:
more common meaning originally established in computer circles
29:
736:, and until it is clarified drawings are only available to
53:
885:
M-LOK Outselling KeyMod about 3 to 1, 28 January 2016
545:
specifications depending on the handguard material:
64:, and by adding encyclopedic content written from a
1415:
1377:
1323:
1258:
1215:
1177:
1149:
898:"KeyMod™ vs. M-LOK™ Modular Rail System Comparison"
157:
149:
139:
134:
124:
116:
100:
428:While M-LOK is licensed free-of-charge, it is not
366:In 2017, a summary report of testing conducted by
282:capable of only 90-degree rotation, reinforced by
732:to determine whether it should be regulated by
307:and M-LOK handguards from various manufacturers
227:ventilation increase the speed of overheating.
171:Magpul MOE M-LOK handguard on a user-assembled
995:"Caracal CAR816 A2 – An Improved H&K 416?"
413:SDMR featuring a Geissele M-LOK rail handguard
1126:
8:
973:"It is Finally Here! The Caracal CAR816 A2"
1133:
1119:
1111:
784:—further development from the MIL-STD-1913
108:
97:
525:Learn how and when to remove this message
84:Learn how and when to remove this message
593:
836:
742:
45:contains content that is written like
1036:
1034:
635: • Flat head counter-
352:Marine Corps Air Ground Combat Center
7:
752:M-LOK handguard and attachment parts
507:adding citations to reliable sources
383:U.S. Army Special Operations Command
297:with the M-LOK attachment system.
207:system for replacing the ubiquitous
1085:"Magpul M-LOK estimated dimensions"
826:—a ringless scope mounting standard
342:on the top rail used by one of the
1259:Compact and non-magnifying sights
997:. arbuildjunkie.com. 13 March 2019
639: • Button head cap
25:
338:has M-LOK rail handguard with an
914:from the original on 18 May 2017
757:
745:
629:
624:
613:
604:
483:
34:
494:needs additional citations for
1144:accessories mounting standards
1042:"magpul.com - M-LOK 2015 FAQs"
599:Hex key spanner (wrench) size
1:
379:Upper Receiver Group-Improved
27:Firearm rail interface system
1231:(1 inch, 30 mm, 34 mm, etc.)
896:McGee, Caleb (4 May 2017).
1477:
1164:Quick-change barrel system
193:developed and patented by
598:
475:Attachment specifications
265:with M-LOK rail handguard
125:Place of origin
107:
975:. smallarmssolutions.com
856:"MRR MODULAR RAIL RIFLE"
457:Technical specifications
231:newer M-LOK handguards.
1017:"Caracal CAR816 A2 SBR"
798:Rail Integration System
1235:Traditional prism rail
1019:. ontargetmagazine.com
959:on opendefinition.org
425:
414:
363:
308:
274:dimensions instead of
266:
176:
420:
409:
333:
303:
261:
241:Adaptive Combat Rifle
191:rail interface system
170:
66:neutral point of view
1456:Mechanical standards
503:improve this article
284:thread-locking fluid
175:semi-automatic rifle
957:Open Definition 2.1
782:NATO Accessory Rail
730:US State Department
462:Rail specifications
350:during training at
58:promotional content
1461:Firearm components
905:thefirearmblog.com
426:
415:
364:
334:The URG-I variant
313:vertical foregrips
309:
267:
177:
135:Production history
60:and inappropriate
1443:
1442:
818:Weaver rail mount
726:
725:
722:" (3.18 mm)
710:" (3.97 mm)
693:" (2.38 mm)
681:" (3.57 mm)
537:The quarter-turn
535:
534:
527:
423:AR-15 style rifle
278:, and utilizes a
195:Magpul Industries
165:
164:
144:Magpul Industries
120:Attachment System
94:
93:
86:
16:(Redirected from
1468:
1207:Warsaw Pact rail
1169:Press fit barrel
1135:
1128:
1121:
1112:
1105:
1104:
1102:
1100:
1091:. Archived from
1081:
1075:
1073:M-Lok dimensions
1070:
1064:
1063:
1061:
1059:
1053:
1047:. Archived from
1046:
1038:
1029:
1028:
1026:
1024:
1013:
1007:
1006:
1004:
1002:
991:
985:
984:
982:
980:
969:
963:
954:
948:
947:
945:
943:
938:
930:
924:
923:
921:
919:
913:
902:
893:
887:
882:
876:
875:
873:
871:
862:. Archived from
852:
846:
841:
761:
749:
721:
720:
716:
709:
708:
704:
692:
691:
687:
680:
679:
675:
633:
628:
617:
608:
594:
590:
589:
585:
580:
579:
575:
567:to reduce cost.
530:
523:
519:
516:
510:
487:
479:
441:source-available
356:Twentynine Palms
112:
103:
98:
89:
82:
78:
75:
69:
47:an advertisement
38:
37:
30:
21:
1476:
1475:
1471:
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1467:
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1465:
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1445:
1444:
1439:
1411:
1373:
1319:
1260:
1254:
1211:
1173:
1145:
1139:
1109:
1108:
1098:
1096:
1083:
1082:
1078:
1071:
1067:
1057:
1055:
1054:on 7 April 2019
1051:
1044:
1040:
1039:
1032:
1022:
1020:
1015:
1014:
1010:
1000:
998:
993:
992:
988:
978:
976:
971:
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966:
955:
951:
941:
939:
936:
932:
931:
927:
917:
915:
911:
900:
895:
894:
890:
883:
879:
869:
867:
866:on 5 March 2016
854:
853:
849:
842:
838:
833:
772:
765:
762:
753:
750:
718:
714:
713:
706:
702:
701:
689:
685:
684:
677:
673:
672:
640:
637:sunk cap screw
636:
634:
620:
618:
609:
587:
583:
582:
577:
573:
572:
541:have different
531:
520:
514:
511:
500:
488:
477:
464:
459:
451:export versions
404:
263:Colt Canada MRR
237:
101:
90:
79:
73:
70:
51:
39:
35:
28:
23:
22:
15:
12:
11:
5:
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1341:
1336:
1330:
1328:
1321:
1320:
1318:
1317:
1312:
1307:
1302:
1300:Shield/Leupold
1297:
1292:
1287:
1282:
1276:
1274:
1256:
1255:
1253:
1252:
1250:S&B Convex
1247:
1245:Swarovski rail
1242:
1237:
1232:
1225:
1223:
1213:
1212:
1210:
1209:
1204:
1199:
1194:
1189:
1183:
1181:
1175:
1174:
1172:
1171:
1166:
1161:
1159:Action threads
1155:
1153:
1147:
1146:
1140:
1138:
1137:
1130:
1123:
1115:
1107:
1106:
1095:on 6 June 2019
1076:
1065:
1030:
1008:
986:
964:
949:
925:
888:
877:
860:coltcanada.com
847:
835:
834:
832:
829:
828:
827:
821:
815:
809:
804:
795:
788:Picatinny rail
785:
779:
771:
768:
767:
766:
763:
756:
754:
751:
744:
724:
723:
711:
699:
695:
694:
682:
670:
666:
665:
662:
659:
655:
654:
651:
648:
644:
643:
622:
611:
601:
600:
597:
565:metric threads
557:
556:
553:
550:
533:
532:
491:
489:
482:
476:
473:
463:
460:
458:
455:
403:
400:
323:adaptors, and
295:upper receiver
236:
233:
209:Picatinny rail
163:
162:
159:
155:
154:
151:
147:
146:
141:
137:
136:
132:
131:
126:
122:
121:
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113:
105:
104:
92:
91:
62:external links
42:
40:
33:
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14:
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10:
9:
6:
4:
3:
2:
1473:
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1435:QD/ Flush cup
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1202:Dovetail rail
1200:
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748:
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492:This section
490:
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469:
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456:
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447:
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438:
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408:
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393:
388:
384:
381:(URG-I) is a
380:
377:In 2018, the
375:
373:
369:
361:
357:
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349:
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328:
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306:
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253:free-floating
250:
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138:
133:
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129:United States
127:
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119:
115:
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106:
99:
96:
88:
85:
77:
74:November 2022
67:
63:
59:
55:
49:
48:
43:This article
41:
32:
31:
19:
1401:
1363:
1221:scope mounts
1097:. Retrieved
1093:the original
1088:
1079:
1068:
1056:. Retrieved
1049:the original
1021:. Retrieved
1011:
1001:19 September
999:. Retrieved
989:
979:19 September
977:. Retrieved
967:
960:
952:
940:. Retrieved
928:
916:. Retrieved
904:
891:
880:
868:. Retrieved
864:the original
859:
850:
839:
792:scope mounts
727:
653:2.5 mm
638:
619:Socket head
610:Thread type
569:
558:
536:
521:
512:
501:Please help
496:verification
493:
465:
448:
434:
427:
378:
376:
365:
344:Green Berets
336:M4A1 carbine
310:
288:
268:
245:
238:
229:
202:open sourced
199:
184:Modular Lock
183:
179:
178:
161:2014–present
95:
80:
71:
56:by removing
52:Please help
44:
1425:Swivel stud
1387:Swivel stud
1327:accessories
1267:holographic
1229:Ring mounts
1089:grabcad.com
738:US citizens
561:UNC threads
539:T-slot nuts
430:open source
348:3rd SFG (A)
291:Colt Canada
213:fenestrated
1450:Categories
1430:Snap hooks
1240:Zeiss rail
831:References
824:Zeiss rail
664:3 mm
661:4 mm
650:3 mm
621:cap screw
515:March 2024
368:NSWC-Crane
360:California
325:flashlight
280:T-slot nut
54:improve it
1397:Versa Pod
1392:Picatinny
1339:Picatinny
1325:Handguard
1192:Picatinny
1179:Receivers
942:8 January
402:Licensing
340:LA-5C/PEQ
289:In 2016,
216:handguard
153:2007–2014
909:Archived
812:UIT rail
802:firearms
770:See also
444:freeware
327:mounts.
276:imperial
249:weld nut
220:fore-end
186:, is a
158:Produced
150:Designed
140:Designer
1290:RMR/SRO
1151:Barrels
1142:Firearm
1058:7 April
1023:7 March
918:3 March
870:4 March
717:⁄
705:⁄
698:#10-24
688:⁄
676:⁄
586:⁄
576:⁄
372:USSOCOM
362:in 2019
235:History
188:firearm
1417:Slings
1379:Bipods
1359:KeyMod
1334:Weaver
1310:CompM4
1295:C-More
1285:Docter
1263:reflex
1217:Scopes
1187:Weaver
807:SOPMOD
776:KeyMod
669:#8-32
641:screw
543:torque
468:metric
411:M110A1
387:SOPMOD
317:bipods
305:KeyMod
272:metric
225:barrel
205:KeyMod
182:, for
102:M-LOK
1402:M-LOK
1364:M-LOK
1315:Micro
1271:prism
1099:2 May
1052:(PDF)
1045:(PDF)
937:(PDF)
912:(PDF)
901:(PDF)
396:AFSOC
392:CQBRs
346:from
321:sling
180:M-LOK
173:AR-15
1407:ARCA
1369:ARCA
1344:NATO
1280:Acro
1219:and
1197:NATO
1101:2017
1060:2019
1025:2023
1003:2020
981:2020
944:2023
920:2024
872:2024
734:ITAR
370:for
117:Type
18:Mlok
1354:UIT
1349:RIS
1305:MOS
1269:or
658:M5
647:M4
505:by
446:).
394:by
1452::
1265:,
1087:.
1033:^
907:.
903:.
858:.
740:.
707:32
690:32
678:64
588:32
578:32
398:.
358:,
354:,
319:,
315:,
1273:)
1261:(
1134:e
1127:t
1120:v
1103:.
1062:.
1027:.
1005:.
983:.
946:.
922:.
874:.
719:8
715:1
703:5
686:3
674:9
584:5
574:5
528:)
522:(
517:)
513:(
499:.
218:/
87:)
81:(
76:)
72:(
68:.
50:.
20:)
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