Diamondhead USA is a West Springfield, Massachusetts based company, that manufactures and distributes advanced combat solutions for the tactical weapons industry. At this time, Diamondhead specializes in accessories for the M4/AR15 platform and any other firearm that uses the M1913 Picatinny Rail system. We are the exclusive licensee, manufacturer and marketer of the acclaimed Diamondhead® Sights and Diamond-Shaped Apertures as well as a variety of Drop-In and Free-Floating Handguards and related accessories. These proprietary and unique products have multiple patents, with other patents pending. All Diamondhead products have a Lifetime Warranty.

Diamondhead USA is well known as a leading producer of top quality accessories for the tactical industry. STAG Arms choose Diamondhead handguards for their number one selling STAG Model 3 rifle, and STAG also uses our sights and handguards on their Model 8 rifle. Windham Weaponry uses our sights and rails exclusively on their premier models. The list of companies that use our products include many of the country’s leading AR15 manufacturers (see home page). In addition to these OEM’s, we are strongly affiliated with professionals in Government, Military and Law Enforcement such as the Connecticut State Police SWAT and California Dept. of Fish & Game.