Sons Of Liberty Gun Works MK1 CAR 5.56 AR-15 SBR - Chrome Lined 11.5" - 1x 30rd Mag

The Sons of Liberty Gun Works MK1 CAR gives shooters a premium short-barreled rifle platform built around precision machining and suppressor readiness. Built on SOLGW's MK1 billet receiver set, this 5.56 NATO SBR pairs a chrome-lined 11.5" barrel with a rail system engineered for minimal deflection under hard use.

Features:

• 5.56 NATO chambering, 11.5" medium contour barrel
• Chrome-lined 41V50 steel barrel with P3 3-groove polygonal rifling
• 5/8x24 muzzle threads, .750" gas journal, carbine gas system
• HUXWRX muzzle device installed
• MK1 billet receiver set with MK1-specific rail system
• Continuous M1913 Picatinny top rail, 7-sided M-LOK slots
• Titanium extended barrel nut with heat management coating
• NP3-coated bolt carrier group
• Liberty Charging Handle
• Liberty 2-stage trigger, 4.5 lbs total pull
• Badger ambidextrous safety
• A5-length buffer system with A5H2 buffer and stainless steel action spring
• Includes one 30-round Gen3 PMAG
• Weighs 6.2 lbs

The 11.5" medium contour barrel uses P3 rifling, a 3-groove polygonal design that improves ammunition forgiveness and extends barrel life compared to traditional land-and-groove rifling. Chrome lining adds corrosion resistance and easier cleaning, while conservative gas port sizing keeps the action running reliably without excess wear. The HUXWRX muzzle device comes installed and ready for suppressor use.

The MK1 rail system is built for minimal deflection, pairing a continuous M1913 top rail with 7-sided M-LOK slots, integrated cable routing, and laser texturing for a secure grip. A titanium extended barrel nut with a heat management coating helps manage heat under sustained fire. Inside, an NP3-coated bolt carrier group pairs with a Liberty Charging Handle and a Liberty 2-stage trigger breaking at 4.5 lbs, while a Badger ambidextrous safety and SOLGW's enhanced A5-length buffer system round out the controls.

As a short-barreled rifle, the MK1 CAR is an NFA item requiring a Form 4 transfer and compliance with all applicable regulations. Each rifle is individually built and test-fired before it ships with one 30-round Gen3 PMAG or a compliant magazine where required by local law.

Sons of Liberty Gun Works backs every rifle with a lifetime warranty and critical use replacement, reflecting the company's focus on building duty-grade rifles meant to perform when it matters most.