5.7x28 AR-15 Upper Assemblies
5.7x28 AR-15 Upper Assemblies
Shop 5.7x28 AR-15 upper assemblies for compact and rifle-length 5.7 AR configurations. Designed around the lightweight, high-velocity 5.7x28mm cartridge, these uppers offer an alternative caliber option for the AR platform. Compatible configurations can fit a standard AR-15 lower or CMMG Banshee lower, depending on the magazine and component setup. Browse Moriarti 5.7 uppers in multiple barrel lengths, including CMMG-compatible configurations. Always check the individual product listing for BCG, charging handle and magazine requirements.
Will a 5.7x28 AR-15 upper fit a standard AR-15 lower?
Yes. The 5.7x28 upper configurations offered in this category are designed to fit a standard AR-15 lower or a compatible CMMG Banshee lower. The correct magazine and related components must match the specific 5.7x28 configuration, so check the individual product specifications for magazine and component compatibility.
5" 5.7x28 AR-15 Complete Upper – 4" M-LOK | BCG & CH Included
Go ultra-compact with the Moriarti 5" 5.7x28 AR-15 Complete Upper, designed for a compact 5.7x28 AR ..
8" 5.7x28 AR-15 Complete Upper – BCG & CH Included | CMMG Compatible
Go compact with the Moriarti 8" 5.7x28 AR-15 Complete Upper, built around a 4150 CMV 5.7x28 barrel a..
16.1" 5.7x28 AR-15 Complete Upper – CMMG Barrel | BCG & CH Included
Build a 5.7x28 AR-15 around a full-length 16.1" barrel with this complete upper assembly. Designed t..