Rails do not necessarily provide any additional heat protection the way a handguard does, though many can. And that, in essence, is the beauty of the AR 15 it’s one of the most customizable firearms available.Ī rail system is often used in place of a basic handguard. The idea is that, by creating an AR 15 modifier with regularly sized and spaced holes, it should be easier for any owner to add other AR 15 rail accessories to modify your firearm just the way you want it, without costly installation assistance or permanent modification. A rail system is two or four rows of ridges and valleys (which look like railroad ties, thus the name) or evenly spaced holes to which you can attach any number of accessories. The rail system - the technical term for it is Rail Interface System (RIS), or sometimes the Rail Accessory System (RAS) - is that handy system that allows you to add attachments such as handstops, bipods, or sights to the upper of your AR 15. With that in mind, the various rail systems available for AR 15s are an important foundational piece to both your firearm and our business. Without a rail system, our namesake scales and handstops would be pretty ineffective, as we’d have nowhere on the AR 15 to attach our awesome accessories. They are, as our company’s name implies, a pretty important AR 15 component to us here at RailScales. Then further tightening will torque it down.Let’s talk rails. The 'lobes' on the T-nut are there to ensure that if the nut is pre-set to the proper distance from the accessory, then inserted into the MLOK slot, the nut should rotate easily 90 degrees (so the nut is perpendicular in the slot) before meeting resistance. The part did feel solid in hand at the time. I was afraid it would have enough bite for a secure hold.

Mine were at about 45 degree or less of an angle if I did it that way. Its keeping the nut perpendicular to the slots. I had no problems getting the nut to catch on the inside. As some of the earlier posters mentioned, it's easier if you pre-tighten the nut most of the way, then push the nuts through, hold the mlok section against the rail and tighten the allen head. Magpul uses a special nut that locks on the slot and lets you tighten it right down. I have both but M-Lok is only one to make me curse and want to remove handguard to add a rail.Then your doing it wrong.

Keymod accessories install