Description
Built for Performance, Not Compromise
The SOLG MK1 SBR isn’t just another short-barreled rifle—it’s a purpose-built tool from Sons of Liberty Gun Works that gets the details right. At 6 pounds 3.2 ounces, it strikes the perfect balance between weight and durability, with a hard coat anodized finish that stands up to Texas weather and hard use. The 11.5-inch barrel maintains proper 5.56mm ballistics while keeping the overall length manageable for vehicle use or home defense scenarios.
What Makes This SBR Stand Out
What sets the SOLG MK1 apart is its closed bolt semi-auto action combined with thoughtful engineering. The 1/2×28 thread pitch means you can mount standard muzzle devices without adapters, and the rifle comes ready to accept your suppressor with proper alignment. Sons of Liberty Gun Works builds these with attention to gas system tuning—you won’t get the over-gassed cycling that plagues many factory SBRs. This rifle runs clean with standard 5.56mm ammunition and maintains reliability even when dirty, which matters when you’re counting on it.
Texas-Ready Configuration
For Texas gun owners, this SBR makes practical sense. The compact size works well in ranch trucks, ATVs, or as a primary home defense weapon where hallways and doorways limit longer firearms. The 5.56mm chambering means you can share ammunition with your AR-15s, and the 30-round magazine capacity handles any situation legally allowed. At dallasshooters, we see customers choosing this platform for everything from ranch patrol to competition shooting where movement between barriers matters more than benchrest accuracy.
Technical Specifications
- Manufacturer: Sons of Liberty Gun Works
- Model: SOLG MK1 SBR
- Caliber: 5.56mm
- Action: Semi-Auto, Closed Bolt
- Barrel Length: 11.5 inches
- Thread Pitch: 1/2×28
- Weight: 6lb 3.2oz
- Finish: Hard Coat Anodized
- Magazine Capacity: 30 rounds
- Warranty: Lifetime
Similar SBR Options
If you’re considering other SBR configurations, we carry several quality options. The Daniel Defense MK18 SBR offers similar 5.56mm performance with different ergonomics. For those interested in 300 Blackout, check out the Q Minifix SBR – 300 Blackout or the Noveske 300 Ghetto Blaster / N4-PDW for suppressed applications.
NFA-Regulated Firearm — ATF Form 4 Required
This is a short-barreled rifle (SBR) regulated under the National Firearms Act. Purchase requires an ATF Form 4 transfer, a $200 federal tax stamp, and approximately 30–120 days of ATF processing (eForm 4 is typically faster than paper). The firearm ships to a licensed FFL/SOT dealer of your choice; you take possession only after ATF approval.
SBRs are currently legal to own in most U.S. states. They remain prohibited or restricted for civilian possession in California, New York, New Jersey, Washington D.C., Hawaii, Iowa, Rhode Island, and Washington State. Check your state and local law before ordering. By placing an order you affirm that possession is lawful in your jurisdiction and that you are 21+ with no prohibiting factors under 18 U.S.C. §922(g).
Questions about Form 4, trust setup, or SOT transfer? Contact us before you order — we’ll walk you through it.
Frequently Asked Questions
What's the NFA process for this SBR?
We handle all NFA paperwork including Form 4 submission. You'll need to provide fingerprints, passport photo, and complete the ATF forms. We guide you through every step and maintain communication throughout the process.
How long does the NFA approval take?
Current wait times average 6-9 months for individual transfers, though trusts may vary. We submit paperwork within 48 hours of purchase and provide tracking for your application status with the ATF.
How do you ship NFA items?
All SBRs ship directly to your chosen FFL holder. We verify their license before shipping and include all required documentation. Your FFL will hold the firearm until your tax stamp arrives.
Why choose 5.56mm for an SBR?
5.56mm maintains good velocity from an 11.5-inch barrel and offers common ammunition availability. It's effective for defense while allowing ammunition sharing with standard AR-15 platforms many Texas owners already have.
Mike R. (verified owner) –
Ran 500 rounds without a single malfunction. The gas system is perfectly tuned—not over-gassed like some factory SBRs. Perfect size for keeping in my truck on ranch patrol.
Sarah K. (verified owner) –
Balance is excellent for a compact rifle. Threads were clean and concentric for my suppressor. Only wish it came with iron sights, but that’s minor for this quality.
James T. (verified owner) –
Lifetime warranty gave me confidence in the purchase. Hard coat finish shows no wear after months of desert shooting. Sons of Liberty builds them right.