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Picatinny rails are similar to Weaver rails (bases), and have a standardization first published by the Picatinny arsenal in 1913. The major difference between Weaver rails and Picatinny rails is the width of the crosswise cuts in them. Picatinny bases have wider slots. The recoil lugs under picatinny rings are thicker to correspond to the wider slots in picatinny bases. Therefore, Weaver rings will fit on picatinny bases, but picatinny rings won't fit on Weaver bases. This is how it's supposed to work, but Weaver style base manufacturers have been cutting thicker slots in their bases to accommodate picatinny rings, and picatinny ring manufacturers have started to put smaller recoil lugs on their rings. The instances of an actual picatinny specification ring not fitting on any Weaver style or picatinny rail are few, and not something to be overly concerned about unless we're talking about the very best mil-spec equipment. Some Picatinny rings are tightened with a torque wrench to a certain number of inch-pounds for repeatability.
Importance of a Secure Rifle Scope Mounting System — Page 3: Picatinny / MIL-STD-1913 Rifle Scope Mounts
by Steven L
02/07/19
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Steve has never not known guns. Before motorcycles, money, or girls, they have always been part of his life. He was tenured as General Manager of one of the country's largest gun stores and ranges, a buyer in a big box outdoor sporting goods store, and is currently OpticsPlanet's Director of Product Intelligence. He was a US Navy nuclear gunners mate, a private investigator, and is an NRA certified instructor in ten categories, as well as an Illinois CCW instructor. He shoots competitively and has hunted from Alaska to Africa. He thoroughly loves life with his beloved wife, Shirley, and together they live with their three wildish dogs Tinker, TranRek, and Crash Almighty. He is a stubborn stage 4 cancer survivor and isn't ready to cash in his chips yet.
Continue following Steve's gun-laden lifestyle with never-ending firearm excursions and experiments with related products! Visit his blog page at Riflescopeblog.com.
