MD5A1

MD5A1 is a designation for a specific type of portable, percussion-sensitive high explosive filler used in United States military munitions. It is a gelatinous, sticky substance primarily composed of the high explosive RDX (cyclotrimethylenetrinitramine) and a plasticizer, often a nitrocellulose-based binder, along with other additives. This composition gives it a putty-like consistency, which allows it to be molded and packed into various shapes and spaces within ordnance. The "MD" in MD5A1 stands for "melted dough," referring to its pliable nature, and the "5" indicates a specific formulation.

The "A1" signifies a revision or modification to the original MD5 formulation, likely involving adjustments to its performance, stability, or manufacturing process. MD5A1 is known for its relatively high brisance and detonation velocity, making it effective for demolition charges, booster charges, and in some artillery shells. Its sensitivity requires careful handling and storage procedures to prevent accidental detonation. While less common in modern explosive formulations compared to some other types, it has been used in a variety of military applications over the years.