SOLGW MK1 CAR 11.5" 5.56
Civilian 11.5" MK1 CAR; the select-fire MK1 won the USSOCOM carbine contract in November 2025.
- Price
- $2,899
- Weight
- 6 lb 3 oz
- Calibers
- 5.56 NATO, .223 Rem
- Rail
- mlok
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Key Highlights
- •Civilian version of the USSOCOM contract-winning MK1 carbine
- •6.2 lb billet 11.5" carbine with reduced-drag raceway coating
- •5/8x24 muzzle threads built around the HUXWRX suppressor
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Sons of Liberty MK1 CAR Pistol - 11.5\" 5.56 P3 CL Barrel - 10.75\" MK1 Cable Management Rail - Anodized Gray - Brace - MK1-CAR-556-115CL-PISTOL-A-GRY
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Overview
The SOLGW MK1 CAR is the civilian 11.5" version of the rifle Sons of Liberty Gun Works built to win the USSOCOM carbine contract awarded in November 2025. The competition variant was select-fire; the commercial MK1 CAR keeps the same billet upper, lower, and rail receiver set and the same barrel and gas system, at 6.2 lb as an SBR and 6.3 lb as a pistol. It is sold as both a braced pistol and a stocked SBR at the same MSRP.
The MK1 rail is machined as part of the receiver set with a continuous 12:00 M1913 top rail and 7-sided M-LOK slots, so a mounted laser and optic stay co-indexed through hard use. The upper raceway carries a reduced-drag coating distinct from the external anodizing, which lets the action cycle on less gas for a softer, cleaner impulse, an advantage that matters most behind a suppressor at 11.5 inches. The 4150 chrome-lined barrel wears a HUXWRX flash hider on a 5/8x24 thread, the oversized muzzle thread SOLGW specified for the HUXWRX can the SOCOM rifle was developed around.
Key Features
- 11.5" 4150 chrome-lined barrel, 1:7 twist, medium contour, carbine-length gas
- 5/8x24 muzzle thread under a HUXWRX flash hider, built for the HUXWRX suppressor
- Billet upper, lower, and MK1 rail receiver set with continuous 12:00 1913 top rail
- 10.75" MK1 handguard with 7-sided M-LOK slots and integral cable routing
- NP3-coated bolt carrier group with a reduced-drag upper raceway coating
- Liberty two-stage trigger at 4.5 lb, integral trigger guard, flared and fenced magwell
- A5 receiver extension with A5H2 buffer, Badger ambidextrous safety, ships with one 30-round PMAG
Capability Profile
0-10 Scale Across 8 Axes
Pros
- +Civilian version of the rifle that won the USSOCOM carbine contract in November 2025
- +6.2 lb weight is exceptional for a billet 11.5" carbine before accessories
- +Reduced-drag raceway coating lets the action cycle on less gas, softer and cleaner suppressed
- +Billet rail set keeps a mounted laser and optic co-indexed on one rigid plane for night work
Cons
- −MSRP with a 120-day lead time at the factory
- −Sold as a pistol and an SBR; the SBR needs a Form 4, the pistol needs a Form 1 to add a stock (federal tax zeroed under OBBBA, registration unchanged)
- −Non-standard 5/8x24 5.56 muzzle thread limits muzzle-device and direct-thread can options versus 1/2x28
- −Proprietary billet receiver set and rail limit some aftermarket parts
Detailed Specifications
- caliber
- 5.56 NATO / .223 Rem
- Barrel Length
- 11.5"
- barrel
- 4150 chrome-lined, medium contour
- Twist Rate
- 1:7
- Gas System
- Carbine-length
- gasJournal
- .750"
- muzzleThread
- 5/8x24
- Muzzle Device
- HUXWRX flash hider
- handguard
- SOLGW MK1 10.75" M-LOK
- receiver
- Billet aluminum upper/lower/rail set
- finish
- Black or gray anodized
- Trigger
- Liberty two-stage, 4.5 lb
- bcg
- NP3-coated
- bufferSystem
- A5 with A5H2 buffer
- safety
- Badger ambidextrous
- weight
- 6.2 lbs (SBR)
- included
- One 30-round PMAG
- warranty
- Lifetime with critical-use replacement
- leadTime
- 120 days at factory
- msrp
- $2,899
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