Ruger factory plastic magazines allow a much longer overall length than the steel Accurate Mags but both work very well. The latch tab on the plastic ones may eventually wear out but so far mine have not. Ruger will repair your rifle if needed. Your .223 has the same basic receiver footprint, lower halves and handguards as the std calibers. However, if you wish to install a Gen 3 Mlok handguard they have a different nut/screw pattern than whatever generation keymod originally came on the .223. Aftermarket cocking pieces from Anarchy Outdoors will work but be sure to specify the older style. Bolt handles, knobs, scope rails, triggers, bolt sleeves and pretty much all other parts are the same as std calibers. If you have issues with primer cratering and/or piercing Ruger will repair/replace the bolt or you can have the pin hole bushed but CCI #41 and Federal Match AR small rifle primers are tough enough to prevent most cratering problems. Muzzle threads are std. 1/2x28. Std AR15 grips will fit but some such as the Sierra Precision will require cutting a very small notch to clear the safety stop. Last but not least, if you want to simplify things you can replace the factory stock assy with an A1 or A2 length AR15 stock and rifle length buffer tube. Magnum calibers require modifications to the buffer tube threads to clearance the cocking piece.