Use what THEY use. The Daniel
Defense MK18 Upper Receiver Group features the railed forend Daniel
Defense currently provides to USSOCOM and a 10.3" Cold Hammer Forged
Barrel. The MK18 Rail Interface System (RIS II) features the Bolt-Up
System has been rigorously tested prior to fielding by USSOCOM. The
10.3" barrel is the same length in use for the MK18 upper most commonly
used for CQB operations. The new independently ambi GRIP-N-RIP Charging
Handle accommodates left- and right-handed shooters and is engineered
for suppressed fire, with anti-gas features that redirect gas flow
upward and away from the face and operator. All Daniel Defense complete
upper receiver groups come standard with an M16 profile bolt carrier
group. NFA DISCLAIMER: Once this part is assembled into a complete
firearm, it becomes a regulated item by the National Firearms Act (NFA).
Please check with your local and state municipalities for any further
regulatory requirements. It is the buyer's responsibility to make sure
they comply with all NFA rules and applicable laws.