New! Gen II, GTR Model 7 Aluminum Bolt Shroud, Silver. The Bolt Shroud is made with 7075-T6. Made in house on our Swiss CNC's. We have bolts from the 1940's to present and were able to adjust the thread, bushing collar and height of the shroud flats to give the best fit in the industry. On average, we are.010 larger in the areas to take out the sloppy fit. We have a better fit of the cocking piece and firing pin to the shroud to prevent binding in the cocked position. Then we have them NORGUARD Nickel Plated to give the best-finished aluminum shroud in the industry. The threads and internals are protected to leave the smooth Nickel Plate and the exterior is bead blasted for the matte stainless finish in the plating process to match the matte stainless steel Remington actions.