MK-18s Close Quarter Battle Receiver are a replacement for the upper receiver of the M-4. Utilizing our modular fully slotted back panel system, storage of MK-18s in Combat Weapon Storage Systems™ is accomplished with standard rack accessories for efficient MK-18 storage.

SOPMOD MK-18s are stored with no additional accessories, utlizing standard components inside of Combat High Density Weapon Racks. SOPMOD MK-18s do take more space to store considering side mounted optics.

Combat Weapon Storage Systems™ will meet the storage requirements for all versions of M4 rifles including storage of most accessories attached to the M4 including optics, scopes, M203 grenade launcher and more.

Combat High Density Weapons Racks come standard with a 10 point locking system meeting OPNAVINST 5530.13C & AR 190-11 for arms storage requirements.

Combat Weapon Storage Systems™ are available as stand-alone fixed storage systems or as high density storage systems mounted to moveable carriages for a compact shelving system. Our background as storage system experts allow our system designers to implement the most efficient, space effective armory design available.

All products and services are available on GSA Schedule to the US Federal Government applications.

MK18s are a variant of the M4 with shorter barrels. Rack shows M4 storage.	M4s stored with SCAR-Ls, MK16