Part Number 8448511K having (CAGE Code 7Z500) and FSC 5360 Coil, Flat, Leaf, and Wire Springs in stock with ready to ship. Get an instant quote for 8448511K Spring Helical Compression by Bushmaster Firearms International Llc. Fill the form below with your desired order quantity, targeted price and the expected order-fulfilment date. Our dedicated account manager will get back to you within 15 minutes.