The One Shot Sled is for the Glenfield Model A Rifle. The polymer flush-fit sled allows only a single round to be loaded into the rifle and provides smooth single-round feeding. When inserted in the rifle the One-Shot sled fits flush with the stock and does not interfere when carrying a slung rifle or shooting from a bag or backpack. The sled is installed in place of a magazine and is compatible with short-action rifles in several calibers- 350 Legend 450 Bushmaster 308 Win 243 Win and 6.5mm Creedmoor. This package includes the following components: sled magazine well two action screws and a 3/16″ Allen wrench. Made in the USA.