The DD5V3 includes an adjustable gas block that allows for a consistent feel whether shooting suppressed or unsuppressed. The perfected bolt carrier group reduces overall recoil impulse and is easy to maintain and operate in all conditions. Designed with an innovative 4-Bolt Connection System, this design dramatically increases the connection surface area between the barrel and upper receiver for increased rigidity/stability to wring out accuracy. The DD5 platforms have upgraded controls like ambi bolt catch, magazine release, safety selector and Daniel Defense enhanced furniture. Accepts All SR-25 magazines. *Note- CA Compliant have a feature requiring the shooter to pull the rear takedown pin out, breaking open the upper receiver and thereby releasing the magazine from the magwell. Accepts All SR-25 magazines. *Note- CA Compliant have a feature requiring the shooter to pull the rear takedown pin out, breaking open the upper receiver and thereby releasing the magazine from the magwell. Made in the USA.