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The only significant difference between the MIL-STD-1913 rail and the similar Weaver rail are the size and shapes of the slots. Whereas the earlier Weaver rail is modified from a low, wide dovetail rail and has rounded slots, the 1913 rail has a more pronounced angular section and square-bottomed slots. This means that an accessory designed for ...
The military standard, MIL-STD-1913 "Picatinny rails" date from the mid-1990s and have very strict military standard dimensions and tolerances. The Picatinny rail has a similar profile to the Weaver, but the recoil groove width of the Picatinny rail is 0.206 in (5.23 mm) versus 0.180 in (4.57 mm) of the Weaver rail/mount, and by contrast with ...
Additional new measurements and tolerances. Adjustments of some measurements. Tighter straightness tolerances (approximately 50%). Another notable change is the recommendation that while in the Picatinny rail system the V-angles are used for the alignment and reference of the accessory, NATO recommends using the top surface instead.
Right: Acro rail on a Picatinny riser. Approximate Acro rail measurements. Many reflex sights (e.g. red dot sights) and holographic sights have proprietary mounts. [23] Aimpoint Acro rail: A dovetail rail for attaching a sight via a clamping mechanism, and with a 4 mm [24] wide straight recoil lug groove. The dovetail is approximately 16.5 mm ...
Right: Acro rail on a Picatinny riser. Approximate dimensions of an Aimpoint Acro rail. Some dovetail rails have integrated recoil lugs. One example is the Aimpoint Acro rail which is a 45 degree rail with a width of approximately 16.5 mm.
Rail integration system - Wikipedia
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The Picatinny team was headed by mechanical designer Gary Houtsma (who was awarded the Order of Saint Maurice Award in 2014 for this contribution [4]), who took the measurements from about twenty different Weaver rail products from weapons bunkers at Picatinny (and even local sporting goods stores) and came up with an average set of numbers set ...
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