The Shark Coast Tactical Grassy Knoll is a 5.56 NATO semi-automatic AR-15 rifle built as a complete bundle around a 16-inch threaded barrel with a black melonite finish. The forged aluminum receiver wears a 2-tone green Cerakote finish, paired with a Picatinny top rail and an M-LOK handguard. It ships with a 30-round magazine and standard AR-15 furniture. 
 

Key Specifications 

• Brand: Shark Coast Tactical 
• Model: Grassy Knoll 
• Caliber: 5.56 NATO 
• Action: Semi-Auto 
• Capacity: 30+1 
• Barrel Length: 16" 
• Barrel Finish: Black Melonite 
• Barrel Material: Chrome Moly Steel 
• Receiver Material: Aluminum 
• Receiver Finish: 2-Tone Green Cerakote 
• Twist Rate: 1:7" 
   

Detailed Features 

• 1:7-inch twist barrel is threaded and topped with an A2-style flash hider 
• Picatinny top rail and M-LOK handguard give a mounting surface for optics and accessories, since it ships without sights 
• Magpul MOE SL grip and an adjustable length of pull suit different shooters 
• Mil-Spec trigger and a thumb safety keep the controls in the standard AR-15 layout 
• 2-tone green Cerakote receiver finish sets the bundle apart from a plain black build

The AR-15 platform that the Grassy Knoll is built on has a long track record, and owners generally describe it as dependable once broken in and run with quality magazines. A forged aluminum receiver and chrome moly barrel are the expected combination for this class of build, and most buyers report no issues with fit or function out of the box, though a handful mention needing to check torque on furniture after the first range trip.

Handling a 16-inch carbine is familiar territory for most AR shooters, and the adjustable length of pull on the stock lets people of different sizes get a consistent cheek weld. The 2-tone green Cerakote finish draws mixed reactions: some buyers like the visual distinction from a standard black rifle, while others would have preferred a plain finish for a lower profile.

On value, an AR-15 bundle like this appeals to buyers who want a rifle ready to shoot without sourcing furniture and accessories separately. The tradeoff some note is that a bundle locks in grip and handguard choices that a builder might otherwise pick individually, though the M-LOK handguard still accepts the usual range of aftermarket add-ons.