Integral lug so no problem if you bed the action, at the least, you should lap the bolt lugs if you plan on a DIY with no receiver modifications. If you plan on a smith contact LRI or Moon at Crescent customs or Clayton at WTO, no particular order. The feed ramp will most likely need to be worked over, CDI will do this no charge if you purchase their bottom metal ( magazine feed not floor plate ) but you will be limited to 2.960 or so for coal