![]() From May 2012, most mounting rails are cut to Picatinny standards. Many accessories can be secured to a rail with a single spring-loaded retaining pin. While some accessories are designed to fit on both Weaver and Picatinny rails, most Picatinny devices will not fit on Weaver rails. Weaver rails have a slot width of 0.180 in (4.57 mm), but are not necessarily consistent in the spacing of slot centers. The only significant difference between the Picatinny rail and the similar Weaver rail are the size and shapes of the slots, where the Picatinny rail has square-bottomed slots while Weaver rails have rounded slots. This means that an accessory designed for a Weaver rail will fit onto a Picatinny rail whereas the opposite might not be possible (unless the slots in the Weaver rail are modified to have square bottoms.) RVG or light mount or even an AFG with your keymod handguard without the thickness of a 1913 rail section. ![]() Keymod’s accessories detached from the rail, slots fractured, and handguards deformed on multiple. ![]() Drop testing: Every accessory attached to M-lok remained attached. Repeatability: M-lok came out on top with an improvement average of over 70 point of aim (POA) shift compared to Keymod. This will allow you to run a Magpul Industries Corp. Results: M-lok outperformed Keymod on 3 of the 5 tests. Whereas the earlier Weaver rail is modified from a low, wide dovetail rail, the Picatinny rail has a more pronounced angular section. Designed to mount heavy sights of various kinds, a great variety of accessories and attachments are now available and the rails are no longer confined to the rear upper surface ( receiver) of long arms but are either fitted to or machine milled into the upper, side or lower surfaces of all manner of weapons from crossbows to pistols and long arms up to and including anti-materiel rifles. Just a sneak peak at the first M-LOK accessory adapter for your KeyMod handguard.
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