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.