Im trying to choose between two daniel defense rails for my project. I am pretty much narrowed down to the following Daniel Defense rails: AR15 Lite Rail 12" FSP vs the M4 12" FSP.
The Lite Rail has a “uninterruped rail system” and I was wondering what some of ya’ll smart guys thought about them…I realize its only a few more teeth on the rail…i plan on just mounting a red dot for the time being so i figured it would have zero necessity.
Also, anybody feel that the “bolt up” system on the lite rail has any major adv. or dis-adv. ?
Some folks span their optics mount on non-continuous rails lol. I’m of the belief that it shouldn’t be done, whether it’s the old school rail with a gap between itself and the upper receiver, or the new handguards that have an extension that bridges the gap.
It’s been reported now and then on TOS that the mount straddled the two separate rails, and there did not seem to be adverse effect. However, almost all of the folks agree it’s not a good idea.
The continuous rail’s benefit is that it gives the users a few more rails and options when mounting their optics, I think that’s about it. An upper with a continuous rail but is not monolithic, no matter how rigid the rail has been attached to the upper, should not be treated as if it were one with the upper receiver, which is the case with monolithic uppers.
I love my lite rail and have had my T1 mounted slightly forward spanning one tooth on the rail for quite a while. You can’t do that with a big locking nut, but you can with an “interrupted/non-interrupted” or whatever you want to call it rail. The lite rail system takes a little longer to install because you have to screw 6 different screws in, 4 one way and 2 the other. But once it is on, it is an incredibly solid system. I have installed and studied multiple mounting systems and I must say the light rail system clamped on the barrel nut is one of the best systems out there. You can’t go wrong with the lite rail. The only thing that some may find negative is that it is taller/thus bigger than what is the popular lower profile/slicker rail systems that have become more prevalent recently. It is still very light though.
It has always been the mantra that you should not span the upper receiver and rail with an optic. But with such solid mounting systems and rails that align perfectly flush with the upper receiver that are now available, is it such a big deal? And are the ones that perpetuate this dogma the same people who are still holding onto their iron sights vs. RDS, FSBs vs low profile GBs, 7inch rail systems vs. longer, flash hiders vs. brakes, and carbine gas vs. middy? I don’t know. Occasionally in this life you have to break free of conventional traditionalism and think outside the box; it is quite liberating.
Hahaha! Yeah, the gapless rail is for a look. You technically get a couple more slots, but whether or not the two extra slots are useful… you’ll have to decide for yourself. As was stated before you shouldn’t try to bridge the gap between the upper and rail with an optic. I personally have the Lite Rail and can recommend them. I have no experience with the M4 rails, but I hear they’re pretty stout pieces too.
I just purchased the M4 12" FSP rail. I was also looking at the Lite rail 12" FSP. I choose the M4 because it felt more comfortable in my hand. Not so much of an “I-beam” feel as opposed to the Lite Rail. The locking collar doesn’t really bother me, I’m used to it on my LaRue rails.
Could someone explain why not? Not questioning, just curious.
I have mounted a 2.5-10x scope on a solid riser thats positioned a bit more forward for better relief, covers the upper rail and second tooth of Omega rail. Feels rock solid and holds zero all day long.
Am I missing something?
Thanks.
No. Common sense says that your mount should be attached to a solid base, but I’ve yet to see a single report of spanning two rail sections with a solid mount, as in your setup, causing any issues.
Looking at it really careful I can honestly say that the lineup on the upper and the Omega rail is pretty close to perfect.
The groups are consistently small, even with repeated remounting little or no adjustment is in order.
With the understanding of course we’re not talking about a long range precision sniper platform.
Even if the rails on the handguard and upper receiver were perfectly aligned, they are still two pieces of hardware that have different harmonics. If you have a mount that straddles them, you could well be twisting the mount and placing stress on the scope.
