Lower Receivers
Build or upgrade your custom rifle with our selection of lower receivers at Boss Firearms. Explore stripped lowers, complete lower receiver assemblies, and tactical firearm parts from top manufacturers.
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LMT Defense - MARS-H Stripped AR10 Lower Receiver LM308AMSL Code "LMT20" at Checkout for 20% Off
LMT Defense
MSRP: $588.00$545.40Use Code "LMT20" at Checkout to Save 20% The LMT Modular Ambidextrous Rifle System (MARS) lower receiver offers ambidextrous controls to include the selector, magazine release and bolt catch and...MSRP: $588.00$545.40 -
LMT Defense - MARS-L DMR Complete AR15 Lower Receiver - M7DM4
LMT Defense
$1,100.00The LMT Defense MARS-L DMR Complete AR15 Lower Receiver (M7DM4) is purpose-built for designated marksman rifle (DMR) configurations. The LMT® Modular Ambidextrous Rifle System (MARS®) lower receiver...$1,100.00 -
LMT Defense - MARS-L PDW Complete AR15 Lower Receiver - M7DA4SH
LMT Defense
$1,019.70The LMT Defense MARS-L PDW Complete AR15 Lower Receiver (M7DA4SH) is a fully assembled, ready-to-build lower receiver featuring LMT's legendary MARS® ambidextrous control system. The LMT® Modular...$1,019.70 -
Out of stockOn Sale
LMT Defense - Defender-L Stripped Lower Receiver - #LMP149H
LMT Defense
MSRP: $195.00Now: $175.50Was: $180.90This stripped AR-15 lower is forged from highly durable 7075 aluminum and has a hardcoat anodized finish. It is fully compatible with Mil-Spec lower parts and made to the exacting tolerances LMT is...MSRP: $195.00Now: $175.50Was: $180.90