Yes, my A5 is pretty new, as is the RVA (both only a few months old). Let us know if anyone finds a better solution than the skinny O-Ring.

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A5 E-Grip (W.A.S.), DOP Pro2 Drop Forward, DOP Vertical Adapter, Palmer Male Stabilizer, Lapco Big Shot 8", JCS folding combat stock w/ RVA, UMS RIS Mk.II, JCS Duel Trigger, Metadyne knurled foregrip 6", UMS Heavy Gunner grip
In the works: Palmer QEV, Vortex, and possible APE Board upgrade.

Not sure how to tell if my A5 is a newer type. Although I just bought it two months ago on ebay brand new. Being that it helped my velocity issues, would still use the item. Anyone know how well the DOP rva works?