No it will not as this item is for 5.56.
Yes. The Spikes Tactical Delta Ring Assembly w/Mil-Spec Barrel Nut will fit on your upper, and allow you to run a more traditional handguard set up.
No, this does not come with a handguard retaining cap.
Yes, this will fit the Ruger AR-556, and will work with drop-in carbine handguards. It is also a plunger tpye.
Yes, this will fit the Ruger AR-556.
Yes, this will fit the Ruger AR-556.
No, it will not. The Gen 2 billet upper receiver was machined with Spikes Tactical's integral B.A.R.2 rail mount. The BAR 2 upper receiver has the BAR 2 barrel nut machined into the upper receiver, meaning it will only work with the Spike's Tactical BAR 2 Rail.
No, the handguard systems are not interchangeable between the AR-15 and the AR-10, so this will not fit an AR-10.
This product is milspec, as opposed to a proprietary barrel nut used with free-float handguards.
Mark H.
Yes, this should be compatible.