Sons of Liberty Gunworks has just launched the Mk.1, an AR-15 pattern 5.56 NATO SBR (short barreled rifle) with a goal of maximizing rail space between the upper receiver and its modern M-Lok equipped handguard.
While this new Sons of Liberty SBR is not built with a single piece monolithic upper receiver, both its upper receiver and the railed M-Lok handguard are designed to mesh together at the rifle’s breech area to mimic the continuity of a monolithic rail in order to offer the end user a “seamless” rail space. This makes it easier to mount optics or gear that work directly with each other, such as magnifiers and red-dot sights or thermal sights and / or IR laser modules. The top portion of this continuous stretch of rail space also includes a deep cut channel through the middle of the Picatinny rail surface to aid the user with cable management and routing for any tactical accessories mounted around this SBR. The edges of the Picatinny rail surfaces are also scalloped and rounded in order to reduce sharp edges that could potentially be harmful to the various cables from the end user’s gear. Sons Of Liberty offers three different kinds of barrels, from stainless steel to standard CMV barrel steel to a polygonal rifled barrel. The gas ports in these respective barrels are conservatively sized to provide smoother function with suppressors.
All Sons of Liberty Gunworks Mk1 SBR lowers are built with longer A5 length receiver extension. These elongated buffer tubes use a rifle-length recoil spring and a longer, heavier buffer to provide smoother and less violent and abrupt cycling for a more consistent and predictable recoil impulse.
Sons of Liberty Gunworks Mk1 SBR Features:
- Integral trigger guard
- Enlarged magazine release fencing
- Enlarged magazine well
- Optimized bolt catch and matching fencing
- Altered forward assist placement for added charging handle clearance
- Rapidly serviceable ejection port door access
- Continuous picatinny top rail with maximum amount or rail slots
- Dual stainless steel anti-rotation dowels
- Broadsword style machined tabs and recesses for Mk1 DriveLock rail lockup
For a full list of specifications and additional information about the new Sons of Liberty Gunworks Mk1 SBR, visit sonsoflibertygw.com.
