Knights Armament 5.56 MCQ-2 Suppressor Blk With QDC Flash Hider - 123993-BLK
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THIS IS A CLASS 3 NFA ITEM. ALL NFA RULES APPLY, this product requires a Federal Firearms License (FFL) and a Special Occupational Tax Stamp (SOT) to be on file. It is the purchaser’s responsibility locate a properly licensed FFL. If we do not have a copy of the clearly signed and dated FFL/SOT, you may email them to [email protected] or use our FFL submission form. Read more about our process here.
NFA Item Cancellation & Refund Policy
Cancellations with Full refunds of NFA items are only possible if a cancellation request is received & acknowledged before the transfer process has been initiated. Initiation of the transfer process is defined as: The ATF form 3 which allows us to transfer the NFA item to your selected dealer has been submitted to the ATF. The ATF form 3 submission typically occurs 1-3 days after your order is placed, depending on order volume and processing times. Cancellations and partial refunds are still possible up until the point the NFA item is shipped to your FFL dealer. Below are the fees that will apply at the various stages of NFA item order processing:
- Order Received – Form 3 not yet submitted: Full refund
- Form 3 Submitted – Not yet approved by ATF: 10% Processing Fee
- Form 3 Approved by ATF – Item not Shipped: 20% Processing Fee
- Form 3 Approved by ATF – Item shipped: No refund
- Form 4 Submitted – Disapproved/Returned without action: 35% Processing Fee + return shipping costs*
*NOTE: This may not always be possible and requires us to successfully recover the NFA item from your dealer with original packaging and in NEW condition. If we are unable to recover the NFA item in the condition stated above, no refund is possible.
This policy is only a guideline and subject to change depending on certain situations. There is significant time and effort involved by both AR15Discounts and your selected dealer to reacquire the item once the ATF form 3 has been submitted and approved.
SKU: 31521 Categories: Suppressors, Excluded from Codes
Elevate your tactical AR-15 setup with the Knights Armament 5.56 MCQ-2 Suppressor, a compact powerhouse engineered for elite performance in close-quarters scenarios. This black oxide-finished suppressor, paired with the QDC Flash Hider, delivers exceptional flash reduction while maintaining the agility of your rifle. Ideal for shooters prioritizing minimal length and weight without sacrificing durability, the MCQ-2 transforms your 5.56 platform into a stealthier, more versatile tool for training, hunting, or defensive applications.
Key Features
- Ultra-Compact Design: Measuring just 5 inches overall and adding only 3.9 inches to your bare muzzle, it keeps your rifle balanced and maneuverable, perfect for short-barreled rifles (SBRs).
- Superior Flash Suppression: Reduces first-round flash to 0.61 mcd*s and subsequent rounds to 0.23 mcd*s, minimizing visual signature in low-light conditions and preserving night vision.
- Low Back Pressure System: Utilizes PRT vented chambers for efficient gas management, ensuring reliable semi-auto and full-auto cycling while reducing shooter exposure to harmful blowback.
- Premium Inconel Construction: Both body and baffles are crafted from high-strength Inconel for exceptional heat resistance and longevity, even under sustained fire.
- Quick-Detach Compatibility: Seamlessly mounts to 5.56 QDC Flash Hiders for fast, secure attachment and removal, enhancing operational efficiency.
Technical Specifications
- Caliber: Rated for .223/5.56/.224 up to .22 maximum
- Length: 5 inches
- Weight: 12.7 oz
- Mount Style: QD (Quick Detach)
- Baffle Material: Inconel
- Baffle Style: PRT vented chambers
- Body Material: Inconel
- User-Serviceable: No
- Finish: Black Oxide
- Sound Levels: 148 dBA at 1m left side; 141 dBA at shooter’s ear
Why Choose the Knights Armament MCQ-2 Suppressor?
In a world of 5.56 suppressors, the MCQ-2 stands out by addressing common pain points like excessive length, added weight, and gas blowback. Its innovative PRT technology not only tames muzzle flash for discreet operations but also promotes consistent rifle function, reducing malfunctions and fatigue during extended sessions. Shooters appreciate its robust build that withstands the rigors of tactical use, offering peace of mind without the bulk of traditional cans. Whether you’re navigating tight spaces or engaging targets at range, this suppressor enhances accuracy by stabilizing your sight picture and protects your hearing with effective sound mitigation— all while keeping your setup lightweight at just 12.7 oz.
Don’t compromise on performance; integrate the Knights Armament 5.56 MCQ-2 Suppressor with QDC Flash Hider into your arsenal today and experience the difference in signature reduction and handling precision.
Frequently Asked Questions
1. Is the MCQ-2 suitable for full-auto fire?
Yes, Knights Armament suppressors like the MCQ-2 are full-auto rated, designed to handle high-volume fire with its durable Inconel construction.
2. Does this suppressor affect rifle accuracy?
No, the MCQ-2 maintains accuracy by providing a stable mounting platform and minimal POI shift when properly installed on compatible QDC flash hiders.
3. What calibers is it compatible with?
It is optimized for 5.56/.223 and rated up to .22 caliber, ensuring safe and effective use across common AR-15 ammunition types.
| Weight | 12.7 oz |
|---|---|
| Dimensions | 4.5 × 1.5 × 1.5 in |
| Mount Style | QD |
| Length (inches) | 5 |
| Caliber (Maximum) | .22 (.223/5.56/.224 |
| Baffle Material | Inconel |
| Baffle Style | PRT vented chambers (not traditional baffles) |
| Body Material | Inconel |
| User-Serviceable | No |
| Finish | Black Oxide |
| MPN | 123993-BLK |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
Please select an FFL from the table below, if you do not see your desired FFL, click "Set Later" and you will be able to enter your FFL's information after checkout.
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