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The rail profile is the cross sectional shape of a railway rail, perpendicular to its length.
Early rails were made of wood, cast iron or wrought iron. All modern rails are hot rolled steel with a cross section (profile) approximate to an I-beam, but asymmetric about a horizontal axis (however see grooved rail below). The head is profiled to resist wear and to give a good ride, and the foot profiled to suit the fixing system.
Unlike some other uses of iron and steel, railway rails are subject to very high stresses and are made of very high quality steel. It took many decades to improve the quality of the materials, including the change from iron to steel. Minor flaws in the steel that may pose no problems in other applications can lead to broken rails and dangerous derailments when used on railway tracks.
By and large, the heavier the rails and the rest of the trackwork, the heavier and faster the trains these tracks can carry.
Rails represent a substantial fraction of the cost of a railway line. Only a small number of rail sizes are made by steelworks at one time, so a railway must choose the nearest suitable size. Worn, heavy rail from a mainline is often reclaimed and downgraded for re-use on a branchline, siding or yard.
Deciding to shed even more weight from my LW rifle, so I replacing my 15" DD SLIM Keymod handguard to something shorter / lighter. All hardware included rail ( screws, barrel nut, DD wrench and 2 KM pic 5 slot rails from BCM used for bipod and flashlight) No blemishes visable, I would say like...
All prices include USPS Frist class s/h.
Items always ship within 24 hours of receiving payment.
Several brand new items made by Arsenal Inc. of Bulgaria. All made for milled rifle(SAM):
-Arsenal Flash Hider RH24x1.5mm $325
-Arsenal lower handguard with triple picatinny rail and heat...
Sorry, this item has sold
New Daniel Defense RIS II MK 18 Rail *
*Wrench not included
Comes with all hardware required
No vampire marks on front of the rail.
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Hello, I haven't had Ruger 10/22 in forever and feel like I should add one to my collection again. I'd like something that had a picatinny rail on top, but I'm out of touch with what 10/22s are like now, or if it's easy to put scope rings on them, I'd like something with a low power optic I...
Time to clean out the parts left over from my previous AR builds. I didnt use them since I decided to go a different direction for my builds.
15" M-LOK Handguards, Matte Black. I have these on a few of my builds and I really like them. They feel very solid and shoot well.