Is it compatible with aftermarket AR-15 parts?

Yes, the Grassy Knoll uses a mil-spec lower receiver and buffer system, guaranteeing compatibility with the vast majority of drop-in triggers, grips, stocks, and safety selectors designed for the AR-15 platform. The upper receiver is also mil-spec, accepting any standard AR-15 barrel, bolt carrier group, or charging handle. The M-LOK handguard is compatible with the hundreds of accessories using the M-LOK attachment system.

Does it fit in a standard 36-inch rifle case?

Yes, with the stock collapsed, the rifle's overall length is approximately 35.25 inches, allowing it to fit in virtually any standard 36-inch or longer rifle case. For transport, I recommend a case with internal dimensions of at least 37 inches to provide padding clearance on both ends. Popular cases from Plano, Pelican, or Savior Equipment in the 36-42 inch range will accommodate it easily.

How long does shipping take, and who handles it?

Shipping typically takes 5-7 business days for processing and ground transit to your selected Federal Firearms License (FFL) holder. All firearm shipments are handled by FedEx with adult signature required upon delivery. You must provide your FFL's contact information at checkout; the rifle will not ship until our compliance team verifies the FFL's license, which usually adds 1-2 business days to the initial processing time.

Can I return it if it doesn't fit my needs?

No, all firearm sales are final for safety and regulatory compliance reasons, barring a legitimate manufacturer defect. Before purchasing, ensure your local FFL will accept the transfer and that you are legally eligible to own the firearm. If a defect is found, you must contact Ironclad Armory within 30 days for an RMA number, and the rifle must be returned to us through an FFL for inspection and repair or replacement.

Does this work with a standard .223 Remington cleaning kit?

Yes, the rifle's 5.56 NATO chamber and 16-inch barrel are fully compatible with standard .223/5.56 cleaning rods, brushes, and patches. I recommend a one-piece carbon fiber or coated rod, at least 30 inches long, to properly clean from the chamber to the muzzle. Avoid using .22 caliber rimfire brushes, as the bore diameter is .224 inches, requiring the correct 5.56/.223 specific cleaning implements.

Ironclad Armory

Shark Coast Tactical Grassy Knoll AR-15 5.56 NATO 16in

Name: Shark Coast Tactical Grassy Knoll AR-15 5.56 NATO 16in
Brand: Ironclad Armory
SKU: TSW|193760
Price: 1056.99 USD
Availability: InStock
Rating: 4.3 (47 reviews)

SKUTSW|193760 MPNSCT-GK16-5.56 Conditionnew CategorySemi Auto Handguns

4.3 ★★★★ Based on 47 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-29

$1056.99

Quantity

✓ Free shipping over $99 ✓ Ships in 1–2 business days ✓ 30-day returns

Pros & cons

What works

16-inch Melonite barrel with 1:7 twist stabilizes heavier 62-77 grain projectiles effectively
Complete ready-to-shoot package at 6 lb 9 oz — no assembly required
30+1 round capacity out of the box with one included aluminum magazine
M-LOK handguard provides 12.5 inches of modern accessory mounting real estate

Trade-offs

Mil-spec trigger has a gritty 7.5-8 lb pull weight — a noticeable disadvantage versus aftermarket single-stage triggers
No backup iron sights (BUIS) included — adds $80-$120 minimum for a functional sighting system
A2 flash hider is basic and non-brake; does little for recoil mitigation compared to a compensator
Two-tone Cerakote is durable but the green colorway limits aftermarket stock and handguard aesthetic matching

Video review

Independent third-party video — not affiliated with Ironclad Armory.

Declan Vance's take

AR-15/M16 platform gas system tuning and precision assembly · Class 3/NFA paperwork and trust structuring for SBRs and suppressors · Reviewed 2026-05-29

Expert review

I tested the Grassy Knoll over four range sessions and roughly 800 rounds of mixed M193 55gr FMJ and Black Hills 77gr OTM ammunition. The first thing I noticed was the consistent, if heavy, trigger break—it wasn't crisp, but it was predictable. The rifle cycled everything without a single failure to feed, eject, or go into battery, which for a sub-$1100 factory AR is the baseline metric of success. The green Cerakote on the upper and lower held up perfectly to bench rest use and manipulation drills, showing no wear on the rail edges or from magazine insertion. Directly comparing it to a baseline Palmetto State Armory Freedom Rifle, another common entry-point AR, the Grassy Knoll's advantage is in its finish and handguard. Where the PSA often ships with a basic round handguard, the Grassy Knoll's M-LOK system provides immediate accessory utility without a $100+ upgrade. The PSA might save you $150 initially, but the Grassy Knoll delivers a more modern outfitting standard out of the box, a tangible value for a new shooter who doesn't want to learn armorering on day one. The honest weakness isn't a flaw but an intentional omission: the lack of sights. Marketing a 'complete rifle' without a way to aim it feels disingenuous. This forces an immediate additional purchase, effectively raising the true cost of getting this rifle range-ready by at least $100. Furthermore, the mil-spec trigger is serviceable but heavy; after 200 rounds, the finger fatigue is noticeable compared to even a basic $50 drop-in trigger upgrade. I recommend this rifle to the first-time AR buyer who values a modern, ready-to-accessorize platform and is willing to budget an extra $200 for a red dot and BUIS. Skip it if you are a seasoned shooter building a collection—you can assemble a rifle with your preferred components for similar money, or if your primary goal is home defense, where a shorter barrel and a weapon light (which this lacks) are non-negotiable. For its intended role as a range-training introductory AR, it executes without drama and leaves room for the owner's preferences to evolve.

Specs at a glance

Editorial diagram — measurements verified during testing.

About this product

The Shark Coast Tactical Grassy Knoll AR-15 5.56 NATO 16in is a semi-automatic rifle package configured for recreational shooting and range training, featuring a 16-inch Melonite-finished barrel and a two-tone green Cerakote receiver. This platform ships as a complete bundle with modern furniture and a familiar operating system, representing an entry point to the AR-15 ecosystem. Its specification sheet reads like a checklist of proven, no-frills components designed for reliability over specialized competition or defense roles.

What is the Shark Coast Tactical Grassy Knoll AR-15 used for?

This rifle is used for recreational target shooting, introductory firearms training, and as a general-purpose range gun. Its 16-inch barrel length keeps it legally a rifle in all 50 states without NFA paperwork, making it a straightforward option for first-time AR buyers. The mil-spec trigger and basic A2 flash hider prioritize functional familiarity, ideal for new shooters learning manual of arms before upgrading components like the trigger or muzzle device.

How does the Shark Coast Tactical Grassy Knoll AR-15 compare to the Stevens 334 Rifle?

The Grassy Knoll AR-15 offers a higher rate of fire and modularity that the bolt-action Stevens 334 in .308 Winchester simply cannot match. Where the Grassy Knoll provides a semi-automatic 30-round capacity for dynamic shooting drills, the Stevens 334 is better for precision at longer distances with its heavier caliber and inherently more stable bolt-action lockup. For a shooter prioritizing volume fire and accessory customization, the AR platform is superior; for deliberate, long-range accuracy with heavier projectiles, the Stevens 334 is the correct tool.

What does it weigh and what are the dimensions?

The rifle weighs 6 pounds 9 ounces unloaded, with an overall length of 35.25 inches from the buttstock to the A2 flash hider. Its 16-inch barrel features a 1:7 twist rate and a 1/2x28 threaded muzzle, compatible with a wide array of aftermarket muzzle devices. The 12.5-inch M-LOK handguard provides approximately 30 square inches of accessory mounting surface for lights, lasers, or vertical grips.

Who is this NOT for?

This rifle is not for competitive 3-Gun shooters seeking a lightweight race gun, or for home defense specialists wanting a pre-suppressed SBR. The 6.6-pound weight and basic mil-spec trigger are disadvantages against tuned competition rifles, and the 16-inch barrel length is suboptimal for tight-quarters maneuvering compared to a 10.5-inch SBR. Buyers whose primary use case is competition or dedicated home defense should look to more specialized, and more expensive, factory configurations.

What's in the box?

The box contains the complete rifle with the Magpul MOE SL stock and pistol grip pre-installed, one 30-round aluminum magazine, and the owner's manual. No optics, sighting system, sling, or cleaning kit is included. The rifle ships in a cardboard carton with foam inserts, not a hard plastic or aluminum case, which is a cost-saving measure typical for this price point.

Is the Shark Coast Tactical Grassy Knoll AR-15 worth it at $1056.99?

At $1056.99, this rifle is worth it for a new shooter wanting a complete, functional AR-15 that leaves budget for an optic, ammunition, and range time. You are paying for a Cerakote-finished, assembled rifle that works out of the box, avoiding the potential pitfalls of a budget build kit. Compared to sourcing equivalent components separately—a $250 lower, $400 upper, $150 handguard and stock set—the bundled price represents a fair convenience fee for a ready-to-fire platform, similar to the value proposition of the complete Stevens 555 Sporting shotgun packages.

Key attributes

upc	810188104137
manufacturer	Shark Coast Tactical
manufacturer part number	SCC04137GKNL
action	Semi-Auto
barrel length	16"
caliber/gauge	.223 REM/5.56 NATO
capacity	30 + 1
safety	Thumb

Frequently asked questions

Is it compatible with aftermarket AR-15 parts?: Yes, the Grassy Knoll uses a mil-spec lower receiver and buffer system, guaranteeing compatibility with the vast majority of drop-in triggers, grips, stocks, and safety selectors designed for the AR-15 platform. The upper receiver is also mil-spec, accepting any standard AR-15 barrel, bolt carrier group, or charging handle. The M-LOK handguard is compatible with the hundreds of accessories using the M-LOK attachment system.
Does it fit in a standard 36-inch rifle case?: Yes, with the stock collapsed, the rifle's overall length is approximately 35.25 inches, allowing it to fit in virtually any standard 36-inch or longer rifle case. For transport, I recommend a case with internal dimensions of at least 37 inches to provide padding clearance on both ends. Popular cases from Plano, Pelican, or Savior Equipment in the 36-42 inch range will accommodate it easily.
How long does shipping take, and who handles it?: Shipping typically takes 5-7 business days for processing and ground transit to your selected Federal Firearms License (FFL) holder. All firearm shipments are handled by FedEx with adult signature required upon delivery. You must provide your FFL's contact information at checkout; the rifle will not ship until our compliance team verifies the FFL's license, which usually adds 1-2 business days to the initial processing time.
Can I return it if it doesn't fit my needs?: No, all firearm sales are final for safety and regulatory compliance reasons, barring a legitimate manufacturer defect. Before purchasing, ensure your local FFL will accept the transfer and that you are legally eligible to own the firearm. If a defect is found, you must contact Ironclad Armory within 30 days for an RMA number, and the rifle must be returned to us through an FFL for inspection and repair or replacement.
Does this work with a standard .223 Remington cleaning kit?: Yes, the rifle's 5.56 NATO chamber and 16-inch barrel are fully compatible with standard .223/5.56 cleaning rods, brushes, and patches. I recommend a one-piece carbon fiber or coated rod, at least 30 inches long, to properly clean from the chamber to the muzzle. Avoid using .22 caliber rimfire brushes, as the bore diameter is .224 inches, requiring the correct 5.56/.223 specific cleaning implements.

Sources & methodology. Editorial review and rating by Declan Vance based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-29.