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The LWRC IC-MKII PST 5.56 NATO 12.70″ SBA3 is a compact, piston-driven AR pistol built for dependable operation in varied conditions. It ships with an SBA3 stabilizing brace and a 12.70-inch barrel, making it a reliable choice for family training and home defense.
| Manufacturer | LWRC |
|---|---|
| Model | IC-MKII PST |
| Material | 7075-T6 aluminum upper and lower receivers, steel bolt carrier per manufacturer specs |
| Compatibility | Standard AR-15 magazines and aftermarket triggers |
| Finish | Hardcoat anodized black |
| Weight | 6.2 lbs (unloaded, per manufacturer) |
| Condition | New |
Key Features
- Piston Operating System – The proprietary short-stroke gas piston reduces fouling and keeps the action running clean, which matters when you’re teaching new shooters and want fewer malfunctions.
- Two-Position Adjustable Gas Block – A paddle-style block inside the rail lets you switch between suppressed and unsuppressed operation, meaning you can run a can without over-gassing the action.
- M-LOK Handguard – The free-floated rail offers 12 mounting slots for lights, lasers, or grips, so you can set up the pistol exactly how your family needs it.
- Updated Upper Receiver – The MKII design includes a reinforced upper with a monolithic-style rail interface, giving you a rigid platform for consistent accuracy.
- SBA3 Stabilizing Brace – This adjustable brace provides a solid cheek weld and can be collapsed for storage, making it easier for smaller shooters to handle the pistol safely.
Who It’s For
This LWRC IC-MKII pistol is ideal for families who want a compact, reliable platform for range training, home defense, or introducing new shooters to the AR platform. The piston system simplifies cleaning, and the adjustable brace fits a range of arm lengths.
Pros and Cons
- Pros: Reliable piston operation, adjustable gas block, lightweight at 6.2 lbs, SBA3 brace included, M-LOK handguard for accessories.
- Cons: Price is higher than many DI AR pistols, and the piston system adds a bit of forward weight that some beginners notice during long sessions.
Comparison
| Feature | LWRC IC-MKII PST | Zev Technologies AR Pistol | Geissele Super Duty Pistol |
|---|---|---|---|
| Operating System | Short-stroke piston | Direct impingement | Direct impingement |
| Barrel Length | 12.70″ | 10.5″ | 11.5″ |
| Brace | SBA3 | SB Tactical (varies) | SBA3 |
| Gas Block | Adjustable (2-position) | Fixed | Adjustable |
| MSRP | $2,948 | $2,200 | $2,600 |
Per LWRC specs, the IC-MKII PST is one of the few production pistols with a factory adjustable gas block, giving you flexibility that most DI pistols lack. One honest drawback is that the price is about 15% higher than a comparable Geissele Super Duty, but you get a cleaner-running piston system.
FAQ
Is this pistol legal to own in my state?
Yes, the LWRC IC-MKII PST is classified as a pistol under federal law and is legal in most states. Check your local laws regarding barrel length and brace configuration, as some states have restrictions on pistol braces.
Can I use standard AR-15 magazines with this pistol?
Yes, it accepts all standard AR-15/M16 magazines, so you can use your existing mags without any adapters.
How does the piston system affect recoil compared to a direct impingement gun?
The short-stroke piston reduces felt recoil slightly because the reciprocating mass is lower, and it keeps the action cleaner, which is a big plus when teaching beginners.
What is the twist rate of the barrel?
The barrel has a 1:7 twist rate per manufacturer specs, which stabilizes both 55-grain and 77-grain bullets accurately.
Trust Block
- ✔ Nationwide delivery (all 50 states)
- ✔ Ships 1-2 business days
- ✔ 30-day returns
- ✔ Secure checkout
Explore more options: AR Pistols | LWRC | Pistol Braces
Last updated: April 2026
FFL Transfer & Firearms Laws for LWRC IC-MKII PST 5.56 NATO 12.70″ SBA3
All firearms, including the LWRC IC-MKII PST 5.56 NATO 12.70″ SBA3, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.
How It Works
- Place your order online.
- Provide your preferred FFL dealer information.
- We ship the firearm directly to your FFL.
- You complete the background check and pickup at the FFL.
Legal Compliance
We comply with all federal and state firearm laws. It is your responsibility to ensure the LWRC IC-MKII PST 5.56 NATO 12.70″ SBA3 is legal in your state. Some states may have restrictions on certain firearm models or features.
Helpful Resources
Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.
Frequently Asked Questions About This Product
Why buy LWRC IC-MKII PST 5.56 NATO 12.70″ SBA3 from Miami Shooters Supply?
We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.
Where can I buy LWRC IC-MKII PST 5.56 NATO 12.70″ SBA3?
You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.
Is LWRC IC-MKII PST 5.56 NATO 12.70″ SBA3 available now?
Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.
What category does this product belong to?
This product is listed under: AR Pistols.
What tags or features does this product have?
Key features and tags for this product include: .
Is this product legal in my state?
It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.
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FFL Transfer & Firearms Laws
All firearms, including the LWRC IC-MKII PST 5.56 NATO 12.70″ SBA3, must be shipped to a licensed Federal Firearms License (FFL) dealer. A background check and any required local paperwork must be completed before you can take possession.
How It Works
- Place your order online.
- Send us your preferred local FFL dealer info.
- We ship the firearm to your FFL after verification.
- Complete background check and pick up from your dealer.
Legal Compliance
We comply with all U.S. firearm laws. It is your responsibility to ensure the LWRC IC-MKII PST 5.56 NATO 12.70″ SBA3 is legal in your state. Some states (e.g. CA, NY, NJ) have restrictions on magazine size or certain features.
Helpful Links
Need help? Contact our team — we’ll guide you through selecting a compliant firearm and the FFL transfer process.
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