Shop All - Firearm Accessories & Parts - AR15 Parts & Accessories - Lower Parts - Heart of Texas Armory

KAK Industry

KAK Industry AR-15 Lower Parts Kit Basic Build Kit (Yellow Bag) - AR15-LP-KT-02

MSRP: $32.99

Was:

Now: $24.99

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KAK Industry

KAK Industry AR-15 Lower Parts Kit Basic Ambidextrous Build Kit - AR15-LP-KT-03

MSRP: $39.99

Was:

Now: $31.99

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Ruger

Ruger AR-15 M4 Stock Assembly Kit Mil-Spec Complete Black - 91007

MSRP: $89.95

Was:

Now: $65.95

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Luth-AR

Luth-AR Lower Parts Builder Kit (No Grip / No Trigger) - LRPK-BLDR

MSRP: $45.00

Was:

Now: $34.95

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LBE Unlimited

LBE Unlimited AR-15 Lower Parts Kit No Grip or Trigger Guard - ARK15LPK

MSRP: $75.00

Was:

Now: $60.95

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Geissele Automatics

Geissele Automatics Standard AR-15 Lower Parts Kit w/ Grip No FCG - 05-987

MSRP: $85.00

Was:

Now: $62.95

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Luth-AR

Luth-AR M16 Full Auto Lower Receiver Parts Kit w/ Auto Sear - LRPK-16

MSRP: $130.00

Was:

Now: $103.00

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Miscellaneous

Tiger Rock Inc. LPK-M16 M-16 Lower Parts Kit w/ Standard Grip & Trigger Guard

MSRP: $99.99

Was:

Now: $83.00

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Miscellaneous

Maf Corp M16 Full Auto Lower Parts Kit

MSRP:

Was:

Now: $85.00

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Miscellaneous

M16 Full Auto Lower Parts Kit Complete FCG

MSRP:

Was:

Now: $110.00

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Sons of Liberty Gun Works

Sons of Liberty Gun Works Enhanced Blaster Guts LPK Liberty Fighting Trigger B5 Grip Black - EBG-B5-LFT-MS

MSRP: $155.00

Was:

Now: $130.00

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Sons of Liberty Gun Works

Sons of Liberty Gun Works Enhanced Blaster Guts LPK Liberty 2-Stage Trigger B5 Grip Black - EBG-B5-L2S-MS

MSRP: $225.00

Was:

Now: $200.00

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Sons of Liberty Gun Works

Sons of Liberty Gun Works Enhanced Blaster Guts LPK Liberty 2-Stage Trigger B5 Grip Black - EBG-B5-L2S-AMBI

MSRP: $245.00

Was:

Now: $220.00

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Sons of Liberty Gun Works

Sons of Liberty Gun Works Blaster Guts AR-15 Complete Lower Parts Kit Black - BG

MSRP: $135.00

Was:

Now: $120.00

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TacFire Inc.

TacFire H2 AR-15 Rifle Buffer Black 4.6 oz - MAR044-H2

MSRP: $54.99

Was:

Now: $39.99

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TacFire Inc.

TacFire AR-15 USA-Made Lower Parts Kit No Grip - LPKUSA-NG

MSRP: $54.99

Was:

Now: $39.95

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TacFire Inc.

TacFire Ambidextrous Safety Selector Lever Gen 2 Black - MAR095-G2A

MSRP: $22.99

Was:

Now: $15.99

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Sons of Liberty Gun Works

Sons of Liberty Gun Works Intermediate 10-Pos Maritime Buffer Tube Kit - SOLGW-INT10POS-KIT

MSRP: $250.00

Was:

Now: $229.00

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Luth-AR

Luth-AR Complete Lower Receiver Parts Kit – M16 w/ Auto Sear & Pin

MSRP: $89.99

Was:

Now: $78.00

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Miscellaneous

KM Tactical Complete AR-15 A2 Stock Kit

MSRP: $100.00

Was:

Now: $68.00

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KAK Industry

KAK Industry M16 Complete Lower Parts Kit w/ Auto Sear - LRPKAKM16LPK

MSRP: $129.95

Was:

Now: $90.00

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Doublestar Corp.

DoubleStar M16 Complete Lower Parts Kit Black - AR320

MSRP: $120.00

Was:

Now: $99.99

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Armaspec

Armaspec Braided Buffer Spring for AR-15 Rifles Black - ARM181-AR15

MSRP: $24.99

Was:

Now: $22.49

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Ruger

Ruger AR-15 Lower Parts Kit No Trigger or Pistol Grip - 91001

MSRP: $59.95

Was:

Now: $39.59

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KAK Industry

KAK Industry AR-15 Lower Parts Kit Basic Build Kit (Yellow Bag) - AR15-LP-KT-02

KAK Industry Basic Build Kit AR-15 LPK Yellow Bag - AR15-LP-KT-02 - 811163035811 Product Description Assembling a custom AR-15 lower receiver with preferred aftermarket triggers, custom pistol grips, and specialized trigger guards often leaves builders...

MSRP: $32.99

Was:

Now: $24.99

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KAK Industry

KAK Industry AR-15 Lower Parts Kit Basic Ambidextrous Build Kit - AR15-LP-KT-03

KAK Industry AR-15 LPK Basic Ambidextrous Build Kit - AR15-LP-KT-03 - 811163035828 Product Description Assembling or refurbishing a custom AR-15 lower receiver requires a complete set of precision-machined lower receiver components that ensure smooth...

MSRP: $39.99

Was:

Now: $31.99

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Ruger

Ruger AR-15 M4 Stock Assembly Kit Mil-Spec Complete Black - 91007

Ruger AR STOCK KIT M4 STOCK - 91007 - 736676910076 Product Description Building or converting an AR-15 lower receiver can present frustrating sourcing hurdles when buffer system components are sold separately. Mismatched receiver extensions, incorrect...

MSRP: $89.95

Was:

Now: $65.95

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Luth-AR

Luth-AR Lower Parts Builder Kit (No Grip / No Trigger) - LRPK-BLDR

*CONTACT US FOR A SPECIAL COUPON CODE* Luth-AR Lower Parts Builder Kit (No Grip / No Trigger) - LRPK-BLDR - UPC 859992007654 Product Description The Luth-AR Lower Parts Builder Kit (LRPK-BLDR) is a high-quality, builder-centric hardware package...

MSRP: $45.00

Was:

Now: $34.95

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LBE Unlimited

LBE Unlimited AR-15 Lower Parts Kit No Grip or Trigger Guard - ARK15LPK

LBE Unlimited AR-15 Lower Parts Kit (No Trigger Guard or Pistol Grip) - ARK15LPK - UPC 765857617275 Product Description The LBE Unlimited AR-15 Lower Parts Kit (ARK15LPK) is a high-quality, Mil-Spec standard internal hardware kit engineered for builders...

MSRP: $75.00

Was:

Now: $60.95

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Geissele Automatics

Geissele Automatics Standard AR-15 Lower Parts Kit w/ Grip No FCG - 05-987

*CONTACT US FOR A SPECIAL COUPON CODE* Geissele Automatics Standard AR-15 Lower Parts Kit w/ Grip (No Trigger/FCG) - 05-987 - UPC 817953025284 Product Description The Geissele Automatics Standard AR-15 Lower Parts Kit with Grip (05-987) is a premium,...

MSRP: $85.00

Was:

Now: $62.95

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Luth-AR

Luth-AR M16 Full Auto Lower Receiver Parts Kit w/ Auto Sear - LRPK-16

Luth-AR M16 Full Auto Lower Receiver Parts Kit w/ Auto Sear and Pin - LRPK-16 - UPC 859992007807 Product Description The Luth-AR M16 Full Auto Lower Receiver Parts Kit (LRPK-16) is a comprehensive, Mil-Spec small-parts package designed specifically for...

MSRP: $130.00

Was:

Now: $103.00

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Miscellaneous

Tiger Rock Inc. LPK-M16 M-16 Lower Parts Kit w/ Standard Grip & Trigger Guard

Precision-engineered, the Tiger Rock Inc. LPK-M16 M-16 Lower Parts Kit provides essential components for firearm assembly and repair. This kit ensures reliable performance with parts designed for durability and ease of installation. Containing critical...

MSRP: $99.99

Was:

Now: $83.00

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Miscellaneous

Maf Corp M16 Full Auto Lower Parts Kit

What is the M16 Full Auto Lower Parts Kit? Everything that goes inside an M16 or FA AR-15 lower receiver, in one kit: fire control group, M16 sear, 3-position selector, and the full set of lower receiver small parts. These are replacement parts for an...

MSRP:

Was:

Now: $85.00

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Miscellaneous

M16 Full Auto Lower Parts Kit Complete FCG

The M16 Full Auto Lower Parts Kit Complete FCG is a complete set of parts that are needed to assemble a fully automatic M16 rifle. The kit is also compatible with all standard M16 lower receivers. If you are looking for a complete set of parts...

MSRP:

Was:

Now: $110.00

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Sons of Liberty Gun Works

Sons of Liberty Gun Works Enhanced Blaster Guts LPK Liberty Fighting Trigger B5 Grip Black - EBG-B5-LFT-MS

*CONTACT US FOR A SPECIAL COUPON CODE* Sons of Liberty Gun Works Enhanced Blaster Guts LPK Liberty Fighting Trigger B5 Grip Mil-Spec Safety - EBG-B5-LFT-MS - UPC 691821688753 Product Description The Sons of Liberty Gun Works Enhanced Blaster Guts Lower...

MSRP: $155.00

Was:

Now: $130.00

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Sons of Liberty Gun Works

Sons of Liberty Gun Works Enhanced Blaster Guts LPK Liberty 2-Stage Trigger B5 Grip Black - EBG-B5-L2S-MS

*CONTACT US FOR A SPECIAL COUPON CODE* Sons of Liberty Gun Works Enhanced Blaster Guts LPK Liberty 2-Stage Trigger B5 Grip Mil-Spec Safety - EBG-B5-L2S-MS - UPC 644625080834 Product Description The Sons of Liberty Gun Works Enhanced Blaster Guts Lower...

MSRP: $225.00

Was:

Now: $200.00

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Sons of Liberty Gun Works

Sons of Liberty Gun Works Enhanced Blaster Guts LPK Liberty 2-Stage Trigger B5 Grip Black - EBG-B5-L2S-AMBI

*CONTACT US FOR A SPECIAL COUPON CODE* Sons of Liberty Gun Works Enhanced Blaster Guts LPK Liberty 2-Stage Trigger B5 Grip Ambi Safety - EBG-B5-L2S-AMBI - UPC 644625198331 Product Description The Sons of Liberty Gun Works Enhanced Blaster Guts Lower...

MSRP: $245.00

Was:

Now: $220.00

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Sons of Liberty Gun Works

Sons of Liberty Gun Works Blaster Guts AR-15 Complete Lower Parts Kit Black - BG

*CONTACT US FOR A SPECIAL COUPON CODE* Sons of Liberty Gun Works Blaster Guts Complete Lower Parts Kit with Liberty Fighting Trigger - BG - UPC 691821607761 Product Description The Sons of Liberty Gun Works Blaster Guts Lower Parts Kit (BG) provides a...

MSRP: $135.00

Was:

Now: $120.00

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TacFire Inc.

TacFire H2 AR-15 Rifle Buffer Black 4.6 oz - MAR044-H2

TacFire® AR-15 H2 Heavy Buffer - 4.6 oz Recoil Mitigation Weight, Aluminum Body, High-Impact Rubber Bumper, Anodized Matte Black Finish - MAR044-H2 / 729205710407 Product Description When running carbine-length gas systems, suppressed setups, or...

MSRP: $54.99

Was:

Now: $39.99

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TacFire Inc.

TacFire AR-15 USA-Made Lower Parts Kit No Grip - LPKUSA-NG

TacFire® USA-Made AR-15 Lower Receiver Parts Kit - Complete Small Parts Kit, Single-Stage Fire Control Group, Less Pistol Grip, Mil-Spec Steel Construction, Black Finish - LPKUSA-NG / 811261027534 Product Description When building a custom AR-15,...

MSRP: $54.99

Was:

Now: $39.95

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TacFire Inc.

TacFire Ambidextrous Safety Selector Lever Gen 2 Black - MAR095-G2A

TacFire® Gen 2 Ambidextrous Safety Selector Switch - Fits AR-15 / AR-10 / M4 Lower Receivers, Dual Levers, Standard 90-Degree Throw, Steel Construction, Anodized Matte Black Finish - MAR095-G2A / 811261026988 Product Description For left-handed...

MSRP: $22.99

Was:

Now: $15.99

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Sons of Liberty Gun Works

Sons of Liberty Gun Works Intermediate 10-Pos Maritime Buffer Tube Kit - SOLGW-INT10POS-KIT

*CONTACT US FOR A SPECIAL COUPON CODE* Sons of Liberty Gun Works (SOLGW) Intermediate 10-Position Maritime Receiver Extension Buffer Kit - Intermediate Length A5-Style Buffer Tube w/ Maritime Drain Holes, 5.6 oz Heavy Buffer, Sprinco Green Power Spring,...

MSRP: $250.00

Was:

Now: $229.00

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Luth-AR

Luth-AR Complete Lower Receiver Parts Kit – M16 w/ Auto Sear & Pin

No MIM here. Luth-AR produces only the best quality, American made parts for the AR platform. All of the parts included in our lower parts kits are investment cast or otherwise machined to Mil-Spec drawings, materials and heat treat. Springs are a...

MSRP: $89.99

Was:

Now: $78.00

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Miscellaneous

KM Tactical Complete AR-15 A2 Stock Kit

Complete AR-15 A2 Stock Kit Product Description:When you want to keep it simple or need to work with your state’s laws our newest A2 Stock Kit comes with everything you need to get your rifle running.The A2 Stock is fully compliant with all states...

MSRP: $100.00

Was:

Now: $68.00

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KAK Industry

KAK Industry M16 Complete Lower Parts Kit w/ Auto Sear - LRPKAKM16LPK

KAK Industry M16 Complete Lower Receiver Parts Kit - Full-Auto Fire Control Group, Includes M16 Auto Sear, Spring, and Pin, Mil-Spec Phosphate Finish - LRPKAKM16LPK Product Description Restoring an NFA-registered machine gun receiver, assembling a...

MSRP: $129.95

Was:

Now: $90.00

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Doublestar Corp.

DoubleStar M16 Complete Lower Parts Kit Black - AR320

DoubleStar M16 Complete Lower Parts Kit - Mil-Spec Select-Fire Components, Heat-Treated Steel Construction, A2 Grip Included, Black Matte - AR320 / LRPDSM16LPK Product Description Rebuilding a registered machine gun lower receiver, setting up a sample...

MSRP: $120.00

Was:

Now: $99.99

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Armaspec

Armaspec Braided Buffer Spring for AR-15 Rifles Black - ARM181-AR15

Armaspec Custom Braided Premium Recoil Buffer Spring - Fits Standard AR-15 Carbine & Rifle Tubes - ARM181-AR15 Product Description Upgrading a primary tactical carbine, custom modern sporting rifle, or high-performance home-defense AR-15 platform for...

MSRP: $24.99

Was:

Now: $22.49

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Ruger

Ruger AR-15 Lower Parts Kit No Trigger or Pistol Grip - 91001

Ruger AR-15 Lower Parts Kit (No Trigger or Pistol Grip) - 91001 Product Description Assembling a custom modern sporting rifle or overhauling an existing patrol carbine often encounters an immediate mechanical and economic bottleneck: component redundancy...

MSRP: $59.95

Was:

Now: $39.59

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