The Gorilla Machining 16” MarksMan Kong upper receiver is designed as a fully Mil-spec compliant pistol series upper for every level of shooter. This upper has the same level of quality and performance that you have come to expect from all of Gorilla Machining products Made In USA. It has been configured at a price range that is affordable to shooters of any budget without sacrificing features and quality.
NOTE: Some states and areas, like California, New York, New Jersey, Connecticut, Massachusetts require certain options and modifications.Please email us Sales@gorillamachining.com for modifications price varies on each modification. Please check with your local FFL if you have questions regarding legality as we cannot be responsible for laws in every state or county.
NOTE: This item is an NFA (less than 16" overall barrel length) upper when used on a rifle lower.
- GM 16" Stainless Steel 416R BR 1:7 Twist Barrel
- AO Precesion Upper Receiver Fully MIL-STD M4A4
- GM Stainless Steel Carbine Length Gas System
- .750" Diameter Gas Seat
- GM Low Profile QPQ Gas Block 4140 Steel
- GM 6061 Aluminum 15” Gorilla MFG M-LOK Free Float Rail System
- GM Mutant Gen 1 Muzzle Brake 4140 Steel
- GM Gen 3 T6 6061 Aluminum Handgaurd
- Ambi Charging Handle T6 6061 Aluminum
- No BCG
- Lifetime Warranty
Our products carry a lifetime, no questions asked, warranty. Simply put... Should any of our products fail, return it to us for a brand new replacement.