SKU: HM16MBUP-556
UPC: 854164007005
The HM Defense Upper 16" 5.56 10 3/8" M-Lok Black receiver is a purpose-built upper assembly designed for precision and reliability in demanding conditions. This upper assembly is ideal for military units, law enforcement precision rifle teams, and serious civilian shooters who prioritize accuracy in their builds.
Built around HM Defense's proprietary MONOBLOC barrel architecture with an integrally machined gas block, this upper assembly eliminates traditional pinned gas block vulnerabilities while maintaining high accuracy standards. The 16-inch barrel length delivers optimal velocity from 5.56 NATO ammunition, while the free-float rail system provides both Picatinny and M-Lok slots for flexible accessory mounting without affecting accuracy.
The 10 3/8-inch handguard offers ample space for modern optic mounts and support hand positioning, contributing to a lightweight design that weighs 4.75 pounds, ensuring comfort during extended use. The 5.56 NATO chambering provides proven ballistics and ammunition availability, making this upper assembly a versatile choice for tactical and training environments.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
