Lower & Upper Receivers
Build your AR-15, AR-10, or precision long-range rifle exactly how you want it. Shop our high-quality stripped and complete lower and upper receivers, matched receiver sets, and enhanced buffer systems.
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Out of stock
Heckler & Koch - MR556 Complete Upper Receiver Kit - 81000584
Heckler & Koch
$2,069.00The MR556A1 Upper Receiver Kit includes a complete upper receiver/barrel assembly, bolt carrier assembly, buffer, and buffer spring allowing most high-quality 5.56 mm AR-style rifles to be...$2,069.00 -
Out of stockOn Sale
Knights Armament - SR-25 Upper Receiver - 20" - 111472
Knights Armament Company
Now: $4,114.69Was: $4,331.25Knights Armament SR-25 upper receiver kit, chambered for 7.62x51mm. Featuring Knight’s 20” cut rifled, precision barrel and their newly designed 3-prong QDC flash hider, the 20” Precision Rifle upper...Now: $4,114.69Was: $4,331.25 -
Out of stockOn Sale
Knights Armament - SR-25 Lower Receiver Assembly 7.62 NATO - No stock - #116858
Knights Armament Company
Now: $1,604.73Was: $1,689.19Built to the same standards as the complete SR-25 rifles, this lower receiver assembly features ambidextrous bolt, selector, and magazine releases, providing left-handed users with the advantages of...Now: $1,604.73Was: $1,689.19 -
Out of stockOn Sale
Knights Armament - SR-30 Lower Receiver Semi-Auto .300 Blackout - #31742
Knights Armament Company
Now: $1,007.82Was: $1,060.29The Knight's Armament SR-30 IWS Complete Lower Receiver comes with with a SopMod stock and ambidextrous controls.Now: $1,007.82Was: $1,060.29 -
Out of stockOn Sale
Knights Armament - SR-15 Complete Upper Mod 2 5.56 NATO - 16" - 31962
Knights Armament Company
Now: $2,014.55Was: $2,120.58The Knights Armament SR-15 E3 Mod 2 series' 5.56 mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug bolt design...Now: $2,014.55Was: $2,120.58 -
Out of stockOn Sale
Knights Armament - SR-15 CQB Upper Receiver - 11.5" - #31963
Knights Armament Company
Now: $2,088.62Was: $2,198.54The Knights Armament SR-15 E3 Mod 2 series' 5.56 mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug bolt design...Now: $2,088.62Was: $2,198.54 -
Out of stockOn Sale
FN America - SCAR 16S 10" .223/5.56 Complete Barrel Assembly - 98802
FN America
Now: $1,299.00Was: $1,499.00The FN SCAR(R) barrel assemblies are cold hammer-forged, chrome-lined MIL-SPEC steel barrels with front sight assembly, gas block assembly, gas regulator, gas piston and flash hider installed...Now: $1,299.00Was: $1,499.00 -
Out of stockOn Sale
FN America - SCAR 17S .308/7.62 13" Complete Barrel Assembly - 98814
FN America
Now: $1,499.00Was: $1,729.00The FN SCAR(R) barrel assemblies are cold hammer-forged, chrome-lined MIL-SPEC steel barrels with front sight assembly, gas block assembly, gas regulator, gas piston and flash hider installed...Now: $1,499.00Was: $1,729.00 -
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