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 - AR10 Lower MARS-H Complete - LM308AM Code "LMT20" at Checkout for 20% Off
LMT Defense
MSRP: $1,470.00$1,363.50Use Code "LMT20" at Checkout to Save 20%Â The LMT Defense MARS-H SOPMOD Complete AR10 Lower Receiver (LM308AM) brings LMT's award-winning Modular Ambidextrous Rifle System to the large-frame .308/7...MSRP: $1,470.00$1,363.50 -
Out of stock
Radian Weapons - AX556 - Stripped Billet Lower FDE - #R0390
Radian Weapons
$514.95Machined from billet 7075-T6 aluminum, the A-DAC 15 is a fully ambidextrous lower receiver for AR15-style firearms. In addition to the Talon Ambidextrous Safety Selector, left-side magazine release,...$514.95 -
Out of stock
Radian Weapons - AX556 - Stripped Billet Lower ODG - #R0391
Radian Weapons
$514.95Machined from billet 7075-T6 aluminum, the A-DAC 15 is a fully ambidextrous lower receiver for AR15-style firearms. In addition to the Talon Ambidextrous Safety Selector, left-side magazine release,...$514.95 -
Out of stockOn Sale
Sons of Liberty Gun Works - Scalper Stripped AR-15 Lower Receiver
Sons of Liberty Gunworks
MSRP: $145.00Now: $137.75Was: $145.00This is a new Sons of Liberty Gun Works "Scalper" stripped lower receiver for all AR-15 platform rifles. Manufactured in collaboration with Rogue American Apparel featuring the Scalper logo and...MSRP: $145.00Now: $137.75Was: $145.00 -
Out of stockOn Sale
Sons of Liberty Gun Works - Angry Patriot Semi-Automatic Stripped Lower Receiver - .223/5.56 NATO - #ANGRYPATRIOT
Sons of Liberty Gunworks
MSRP: $145.00Now: $137.75Was: $145.00The Sons of Liberty Gun Works stripped lower receivers are made to the tightest tolerances while still being compatible with Mil-Spec parts and upper receivers. This ensures that there is...MSRP: $145.00Now: $137.75Was: $145.00 -
LMT Defense - Complete MARS-L SOPMOD Lower Receiver - M7DA4
LMT Defense
$969.30The LMT Defense Complete MARS-L SOPMOD Lower Receiver (M7DA4) is the full-featured SOPMOD-configuration MARS-L complete lower receiver. The LMT® Modular Ambidextrous Rifle System (MARS®) lower...$969.30 -
Out of stock
Knights Armament - SR-15 Lower Receiver Assembly 5.56 NATO - #25780
Knights Armament Company
$1,060.29The Knight's Armament SR-15 IWS Complete Lower Receiver comes with with a Magpul stock and six-position buffer tube. The ambidextrous bolt release, selector lever, and magazine release offers...$1,060.29 -
LMT Defense - MARS-H DMR MWS Lower Receiver AR10 - #LM308AMD
LMT Defense
MSRP: $1,525.00$1,413.90The MARS-H brings the innovative design of our MARS-L to the MWS® platform. The LMT® Modular Ambidextrous Rifle System (MARS®) lower receiver offers ambidextrous controls to include: selector,...MSRP: $1,525.00$1,413.90 -
Out of stock
LMT Defense - Defender-H Stripped .308 Lower Receiver - #LM308A1
LMT Defense
MSRP: $380.00$352.35The Defender-H lower receiver, also known as the original LMT .308 Modular Weapon System (MWS) lower receiver, is an intermediate-caliber receiver designed specifically for use with LMT’s MWS upper...MSRP: $380.00$352.35 -
Out of stock
LMT Defense - MARS-L Stripped AR15 Lower Receiver - R-M7SL
LMT Defense
MSRP: $380.00$352.35The LMT Defense MARS-L Stripped AR15 Lower Receiver (R-M7SL) is the foundation of the legendary LMT MARS® system. The LMT® Modular Ambidextrous Rifle System (MARS®) lower receiver sets a new standard...MSRP: $380.00$352.35 -
Out of stock
KAC Knights Armament Company SR-25 AMBI V2 Lower Receiver 121461
Knights Armament Company
$1,440.00The Knights Armament SR-25 AMBI V2 Lower Receiver Kit (121461) is a factory-complete lower assembly built for KAC's SR-25 platform in 7.62 NATO / .308 Win. It's forged from 7075-T6 aluminum and...$1,440.00 -
LMT Defense Pistol Lower MIDMLK125-MARS-LOWER
LMT Defense
$899.00Pistol Lower from Exclusive 12.5" MARS-L Specwar Pistol MIDMLK125-MARSP The LMT Defense Pistol Lower is the full-featured$899.00