The RPR is also design to accept both Magpul and AICS magazines which allows those with a collection of metal AICS magazines to be able to use them. The AICS mags were a bit loose and rattled a little, but they did work without issue. The bolt itself is a bit odd in that there is a long shroud, or “hat”, that extends off the back of the bolt which is there to help with bolt control as it cycles back. It is necessary since the action is a MSR frame and not a traditional built up action on a normal bolt action rifle. As the bolt is cycled to the rear that long hat extends back into the buffer tube area and supports the bolt allowing it to extend and slide directly back. It is somewhat odd looking, but accomplishes what it was designed to do. The bolt itself has three lugs which allows it to have a shorter 70 degree bolt throw combined with a full diameter bolt body that matches the diameter of those three lugs. This is the same bolt design as the Ruger. The barrel on the RPR is a medium weight cold hammer forged chrome-moly steel barrel with 5R rifling of which Ruger claims has minimum headspacing and is centralized for accuracy. Of course these are mass produced rifles so expectations should be kept in check about how tight the chambers and rifling may be, but it appears they have gone to extra measures to help with accuracy. On this test rifle chambered in 6.5 Creedmoor, the RPR has a 24″ barrel, where as the 308 and 223 versions have a 20″ barrel. Located on the muzzle is a muzzlebrake of Rugers own design that only has ports on the sides in an effort to minimize dust signature when firing. As is the overall theme with the RPR, the muzzlebrake can be removed and a different one used if desired.