Diamondhead USA, is a West Springfield, Massachusetts company. Diamondhead is nationally known and respected as a leading design innovator, manufacturer and distributor of top quality accessories for the Tactical Weapons industry. Diamondhead specializes in the M4/AR15 platform and has recently developed products for .308 caliber rifles. The original Diamond Sights with the patented Diamond-shaped Apertures and Diamond-shaped upper housings - that launched the company - have now grown to over a hundred products. Diamondhead offers a Lifetime Warranty on everything Diamondhead manufacture.