Lower Receivers
Gas & Brass Armory offers a full selection of AR-15 lower receivers in Brandon, FL—perfect for your next rifle build or upgrade. Choose from trusted brands like Aero Precision, Anderson, BCM, and more. Whether you're looking for stripped lowers for a custom build or complete lowers ready to pin on your upper, we have durable, mil-spec components to fit your needs. Visit us in-store or shop online with confidence.
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LANTAC RVN BLLT BUILDER SET 10.5 RL
LanTac USA LLC
MSRP: $773.94$673.00The Lantac AR-15 builder set includes an upper and lower receiver along with an M-LOK handguard. Their Raven billet receiver set is machined from certified 7075-T6 aluminum and finished with Type 3 Hardcoat. The lower receiver features a 45-degree BAD...MSRP: $773.94$673.00 -
LANTAC RVN BLLT BUILDER SET 6.75 RL
LanTac USA LLC
MSRP: $754.39$656.00The Lantac AR-15 builder set includes an upper and lower receiver, along with an M-LOK handguard. Their Raven billet receiver set is machined from certified 7075-T6 aluminum and finished with Type 3 Hardcoat. The lower receiver features a 45-degree BAD...MSRP: $754.39$656.00 -
LANTAC SF FRGD BUILDER SET 13.5 RL
LanTac USA LLC
MSRP: $591.66$515.00Lantac AR-15 builder set includes an upper and lower receiver along with an M-LOK handguard. Their forged receiver set is packed with 'above milspec' features, making it an ideal choice for shooters seeking an upgraded configuration while maintaining a...MSRP: $591.66$515.00 -
LANTAC SF FRGD BUILDER SET 12.5 RL
LanTac USA LLC
MSRP: $587.06$511.00Lantac AR-15 builder set includes an upper and lower receiver along with an M-LOK handguard. Their forged receiver set is packed with 'above milspec' features, making it an ideal choice for shooters seeking an upgraded configuration while maintaining a...MSRP: $587.06$511.00 -
LANTAC SF FRGD BUILDER SET 10.5 RL
LanTac USA LLC
MSRP: $579.01$504.00Lantac AR-15 builder set includes an upper and lower receiver along with an M-LOK handguard. Their forged receiver set is packed with 'above milspec' features, making it an ideal choice for shooters seeking an upgraded configuration while maintaining a...MSRP: $579.01$504.00 -
LANTAC SF FRGD BUILDER SET 6.75 RL
LanTac USA LLC
MSRP: $614.36$492.00Lantac AR-15 builder set includes an upper and lower receiver along with an M-LOK handguard. Their forged receiver set is packed with 'above milspec' features, making it an ideal choice for shooters seeking an upgraded configuration while maintaining a...MSRP: $614.36$492.00 -
GGP BILLET LOWER RCVR
Grey Ghost Precision
MSRP: $170.65$122.00The MKII version of the GGP-S Series brings a new level of customizability never before seen in our rifle receivers. Not only can you build your own version of the Heavy or Light rifle, but you can use your favorite aftermarket parts to complete the...MSRP: $170.65$122.00 -
FORTIS LICENSE GEN II AR15 SET AMBI
Fortis Manufacturing Inc.
MSRP: $516.50$414.00Introducing the Fortis License Lower Receiver. Made from 7075 T6 billet aluminum. The GEN II has all the same features from the first edition, but with added integrated carbon fiber.MANUFACTURER: Fortis Manufacturing, Inc.MPN: LM-7075-GEN2-AMODEL:...MSRP: $516.50$414.00 -
FORTIS LICENSE GEN II AR15 LWR STD
Fortis Manufacturing Inc.
MSRP: $279.00$224.00Introducing the Fortis License Lower Receiver. Made from 7075 T6 billet aluminum. The GEN II has all the same features from the first edition, but with added integrated carbon fiber.MANUFACTURER: Fortis Manufacturing, Inc.MPN: L-7075-GEN2-SMODEL: License...MSRP: $279.00$224.00 -
FMK AR15 POLYMER LOWER RECEIVER BLUE
FMK Firearms
MSRP: $55.93$40.00Manufactured in the USA of a high impact proprietary composite polymer. This state of the art polymer allows for superior strength, unmatched durability and is extremely lightweight. The Ar1 eXtreme is by far the strongest composite polymer lower on the...MSRP: $55.93$40.00 -
FMK AR15 POLYMER LOWER RECEIVER BB
FMK Firearms
MSRP: $44.79$32.00Manufactured in the USA of a high impact proprietary composite polymer. This state of the art polymer allows for superior strength, unmatched durability and is extremely lightweight. The Ar1 eXtreme is by far the strongest composite polymer lower on the...MSRP: $44.79$32.00 -
FMK AR15 POLYMER LOWER RECEIVER BLK
FMK Firearms
MSRP: $44.79$32.00This state of the art polymer allows for superior strength, unmatched durability and is extremely lightweight at only 4.3oz. The AR1 extreme is by far the strongest composite polymer lower on the market today.MANUFACTURER: FMK FirearmsMPN: FMKGAR1EMODEL:...MSRP: $44.79$32.00