The Recon Scope Mount features vertically split rings that are interchangeable for different size scope main tubes. If you switch to a different scope in the future, you will only have to replace the ring set. This makes the Recon mount a modular and cost effective mount. The Delta Scope Mount features horizontal split rings, with the bottom ring half as part of the scope base itself. If you do change the scope main tube size, you will need to purchase a new mount. The Delta Mount was designed with FN for the SCAR Program, so it is an overbuilt mount designed to withstand the unique, heavy recoil of the SCAR Platform.