The MK114 Mod 2-M is a complete upper receiver chambered in 223 Wylde with a 14.5-inch barrel and integrated FSC 556 flash suppressor/compensator.MK114 Mod 2-M Complete Upper Receiver223 Wylde chamber for enhanced accuracy with both .223 and 5.56 ammunition14.5-inch barrel lengthFSC 556 flash suppressor/compensator includedComplete upper assembly ready for installationDesigned for tactical applications and precision shooting this upper receiver offers versatility and performance for AR-15 platform builds requiring compact barrel length with effective muzzle control.