Description
Both the upper and lower receivers of the M4-SBR-L are machined from 7075-T6 aluminum billet and hardcoat anodized in a variety of colors. Since Franklin Armory uses CNC machines to carve out each receiver from a solid block of aluminum alloy, giving them a distinctly beefier look than usual, the company can also add custom features directly to the parts. The lower receiver has an integrated and enlarged triggerguard for ease of use with gloved fingers. At the front of the triggerguard and just
