This is the correct metal for your USMC Sniper project. As used by the most respected USMC Scout Sniper rifle builders. These parts are correct for your USMC M40A1 Sniper project HOWEVER THEY CAN AND SOMETIMES WILL require minimal amounts of fitting to your USMC Spec M40A1 HTG stock.
A qualified gunsmith will easily be able to fit this to your USMC SPEC McMillan HTG stock. Listing shows parts fit to USMC issued M40A1 rifle stock. Listing includes (1) trigger guard and (1) floor plate. The item "M70 USMC M40A1 Scout Sniper Rifle Bottom Metal Steel Floor Plate & Trigger Guard" is in sale since Saturday, August 8, 2020. This item is in the category "Sporting Goods\Hunting\Gun Parts\Rifle".The seller is "thehogsden" and is located in Camp Pendleton, California. This item can be shipped to United States.