 All SACO receivers are designed for ultimate accuracy and smooth operation. All SACO 9-derifle receivers are designed to minimize contact area between the bolt and receiver to achieve the world's smoothest bolt operation. Receiver are manufactured using broaching operation that creates internal surfaces matching the profile of the bolt locking locks. SACO broaching is a method where steel is carved to the desired shape by pushing multiple bolt shape cutting tools through the receiver. This method creates straight interior and smooth surfaces for the bolt to move inside the receiver. The smoothest bolt operation is a paramount importance to achieve fast repeated shots when needed. SACO bolt is so smooth that you can keep your sightline while loading a new round to the chamber. Receiver is the heart of the rifle. All key components are directly linked to it. Receiver takes and transmits the recoil forces and that's why the shape, design, material and bedding need to be done in harmony to achieve repeatable accuracy. SACO 9-deriver design has been reinforced from the past. Horsional bedding and twisting has been minimized by designing desired shapes to critical areas, especially on the top of the ejection port. SACO has a flat receiver bedding that creates better repeatable accuracy than conventional round receiver design. Accuracy in mind, the SACO 9-debedding with its steel recoil lock and fine-tuned surface work together to ensure that all components return to the same state after each shot, enabling repeatable accuracy. SACO 9-de has a different receiver size tailored to different calibre groups. This enables the shortest bolt throw distance for the calibre size enabling fast bolt operation and fast consecutive shots to the target. Optimized receiver size also ensures that you are not carrying extra weight when hunting. All SACO 9-de rifle have three locking lock design. In conjunction with the different exercises, the locking lock surface area has been optimized so that all calibre group have maximum lug surface area. SACO 9-de bolt locking lugs are manufactured to always ensure a full contact with the counterpart surface. On top of this, every SACO 9-de are factory tested prior shipping with two high pressure shots at SACO factory. This all work to ensure maximum safety. Robust ejection of an empty case in SACO 9-de rifle is ensured by double plunger arrangement famous from the acclaimed SACO tier G family of military and law enforcement sniper rifles. This is especially important when hunting dangerous game. SACO bolt operation has been verified by over 5 million cycles without malfunction. SACO bolt is the most reliable field tested and proven to ensure the safety and robust operation of SACO 9-de rifle platform.