Magpul Rail Sling Attachment and Maintaining Scope Zero

[CmdrSlander]

I am working on an AR15 build (thankfully I acquired the rifle pre-panic ) that uses the VLTOR CASV-EL, which is a piggyback mount free float handguard, as a piggyback mount handguard it attaches to the flattop rail of the AR15's upper and replaces it with its own rail, so all scopes now attach to the handguard's piggyback rail. If I attach a Magpul Rail Sling attachment to the same rail is the pressure of the sling and the weight of the rifle on the handguard when the rifle is slung going to affect the rail or the scope's zero?

Here is a picture of the rail mounted to someone else's gun so you can get an idea of the setup, the Magpul RSA would be attached to the top rail near the FSB.

 

[Aaron Baker]

I don't see an issue. If it's free-float, then the handguard doesn't touch the barrel. POI is only going to change if there's a contact point with the barrel.

As for the other part of the question, I don't know how strong that rail is... but I imagine the rail is strong enough to handle having a sling attachment point stuck on the end of it. Wouldn't be much good otherwise.

Aaron

 

[CmdrSlander]

I don't see an issue. If it's free-float, then the handguard doesn't touch the barrel. POI is only going to change if there's a contact point with the barrel.

As for the other part of the question, I don't know how strong that rail is... but I imagine the rail is strong enough to handle having a sling attachment point stuck on the end of it. Wouldn't be much good otherwise.

Aaron

I should say not POI, but maintaining scope zero since the scope is attached to the same rail.

 

[stubbicatt]

Try it and see. No substitute for experience.

 

[helotaxi]

Unless you're talking about "slinging up" for shooting, it isn't even worth discussing because it won't have an effect. If you are talking about using the sling as a shooting aid, then consistency is going to be your friend, but the rear part of the rail is pretty well anchored and shouldn't move in relation to the barrel. My only concern would be some flex in the forearm section. It shouldn't affect the scope zero, though.