This Daniel Defense M4 V7 Pro features a M-LOK attachment technology with Daniel Defense MFR XS 15.0 rail. It has a cold hammer-forge barrel with a Gen II muzzle climb mitigator and a rifle length gas system which provides smooth and reliable cycling under any condition. Its free-floating MFR XS 15.0 handguard offers incredible weight savings as well as superior cooling, ergonomics, and modularity while maintaining strength and durability. Included is a bullet button and a 10+1 magazine. The Daniel Defense California compliant design prevents the magazine release button from being engaged while fully assembled, locking the magazine into the receiver. To release the magazine from the rifle, the shooter will be required separate the upper from the lower by pulling on an extended (rear) takedown pin with an attached cord to make the process easier.