About Real Gun
The M4 carbine and M16 are not ideally suited for all missions, so it was proposed that the modularity of the M16 series would allow a user to replace the upper receiver of an existing weapon with one more suitable to the task. One of two proposed special mission receivers that were planned for inclusion into the SOPMOD Block II kit, the CQBR has taken off on its own. Like the proposed Special Purpose Receiver, the Close Quarters Battle Receiver has been more or less taken on by NSWC-Crane as its own project following the CQBR?s removal from the SOPMOD program. Just as the Special Purpose Receiver morphed into the Special Purpose Rifle and was type-classified like the Mk12 Mod 0/1, the complete CQBR equipped carbine has been type-classified as the Mk 18 Mod 0, or the Mk 18 Mod 1.

GHK (COLT) MK18 MOD1 GBB Rifle Airsoft Gun (Forged Receiver)
Realistic, Stable & Powerful Recoil System by GHK
Fully licensed COLT.
GHK Gas Blow Back Rifle

Full Metal Receiver (Engraved "Colt" Marking with Logo) 
Metal Outer Barrel With Steel Muzzle Brake
RIS Rail System handguard
Cocking Handle can be locked & released
Flip-up Front & Flip-Up Rear Sight
Extendable 5 Position Crane Stock
Polymer Pistol Grip
Polymer Housing 40 rounds loading capacity Gas magazine
Steel Bolt Release, pin, Magazine Release, Bolt, Selector

Sling mount can be installed with any single, 2- or 3- point tactical sling
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