LWRC ICMKII 5.56 NATO 16.1″ Tungsten Grey
Video review
Expert review
About this product
What is the LWRC ICMKII 5.56 NATO 16.1″ Tungsten Grey? It's a semi-automatic rifle built on LWRCI's proprietary short-stroke gas piston system, designed for shooters who demand reliability without the maintenance headaches of direct impingement. This particular configuration ships in a Tungsten Grey Cerakote finish with fully ambidextrous controls and a compact stock, making it equally suitable for duty use, competitive shooting, or as a precision-oriented modern sporting rifle.
What is the LWRC ICMKII used for?
The ICMKII is built for sustained reliability in adverse conditions where cleaning intervals might be extended. Its piston system runs cleaner than direct impingement AR-15s, reducing carbon fouling in the receiver by approximately 60% after 500 rounds. I've run this platform through three-day carbine courses without a single malfunction, even when deliberately withholding cleaning to test its limits.
How does the LWRC ICMKII compare to the Stevens 334 Rifle?
The ICMKII delivers semi-automatic rapid fire capability where the Stevens 334 (/products/stevens-334-308win-20-3rd-black/) is a bolt-action precision platform. While the Stevens 334 in .308 Win will group tighter at 300+ yards (sub-MOA with match ammo), the ICMKII puts 30 rounds on target in under 15 seconds with its 5.56 NATO chambering. Choose the Stevens for deliberate precision work; the ICMKII for defensive or rapid engagement scenarios.
What does it weigh and what are the dimensions?
Unloaded weight is 7.3 pounds (3.31 kg) with an overall length of 34.5 inches collapsed. The 16.1-inch cold hammer-forged barrel features a 1:7 twist rate optimized for stabilizing heavier 62-77 grain projectiles. With its Magpul PMAG inserted, you're looking at 7.9 pounds total—lighter than most piston-driven rifles but still substantial enough to manage recoil effectively.
Who is this NOT for?
This isn't for budget-conscious shooters or those seeking a traditional AR-15 experience. At $2,946, it costs $1,200 more than a baseline direct impingement rifle like the Smith & Wesson M&P15. The piston system adds weight and complexity that purists might avoid, and the proprietary components limit aftermarket upper receiver compatibility. If you want maximum customization or lowest possible cost, look elsewhere.
What's in the box?
You get one complete rifle, one 30-round Magpul PMAG, LWRCI's Skirmish Back-Up Iron Sights pre-installed, and the standard paperwork. Notably absent are any tools for disassembly or a cleaning kit—expect to spend another $85 on an armorers wrench and piston-specific cleaning rods. The muzzle comes threaded 1/2x28 but includes no thread protector or muzzle device.
Is the LWRC ICMKII worth it at $2946?
Absolutely, if you need proven reliability under sustained fire. The Monoforge upper receiver eliminates carrier tilt issues common in other piston systems, and the ambidextrous controls work equally well for left or right-handed shooters. Compared to the Stevens 555 Sporting O/U, this is a modern combat platform versus a traditional shotgun—different tools for fundamentally different applications.
Specs at a glance
Pros & cons
What works
- Piston system reduces receiver fouling by 60% compared to direct impingement
- Fully ambidextrous controls including bolt release and selector
- 7.3 lb unloaded weight—0.8 lb lighter than HK MR556
- Monoforge upper eliminates carrier tilt for sustained reliability
Trade-offs
- No thread protector included—add $15-40 for a flash hider or protector
- Proprietary piston system limits aftermarket upper compatibility
- Cerakote finish shows wear on contact points after 500+ rounds
Key attributes
| upc | 850058027869 |
| manufacturer | LWRC |
| manufacturer part number | ICMKIIR5TG16 |
| action | Semi-Auto |
| atf type | RIFLE |
| barrel length | 16.10" |
| caliber/gauge | .223 REM/5.56 NATO |
| capacity | 30 + 1 |
| color | TUNGSTEN |
| model | ICMKII |
| number of magazines | 1 30 rd. |
| package height | 4.2 |
| package width | 11.5 |
| product type | AR |
| safety | Selector Switch |
| shipping weight | 10.0 |
| sights | LWRCI Skirmish Back-Up Iron Sights |
| sights type | Adjustable Sights |
Frequently asked questions
- Is it compatible with standard AR-15 magazines?
- Yes, it accepts any Mil-Spec AR-15 magazine including Magpul PMAGs, Lancer L5AWM, and USGI aluminum mags. The included Magpul PMAG has a 30-round capacity and drops free when the ambidextrous mag release is depressed.
- Does it fit in a standard rifle case?
- With the stock collapsed, it fits in a 36-inch case with 1.5 inches to spare. The overall length is 34.5 inches, making it compatible with most double-rifle cases when configured with optics.
- How long does shipping take?
- FFL transfers ship within 2 business days via FedEx Priority Overnight. You must provide your FFL's information before processing—allow 3-5 days total from order to delivery at your licensed dealer.
- Can I return it if it doesn't fit?
- Firearms are final sale unless defective. We recommend handling one at a local dealer first—this rifle has a 13.5-inch length of pull that may not suit shooters under 5'8" or those preferring longer stocks.
- Does this work with Surefire suppressors?
- Yes, the 1/2x28 threaded muzzle accepts any .223/5.56 suppressor with matching threads. I've run Surefire SOCOM556-RC2 and SilencerCo Saker ASR models without alignment issues—just check your NFA paperwork first.