Lower Receiver Part Kits
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AT3™
AT3™ Mil-Spec AR-15 Magazine Catch Button – 10 Colors Available
Mil-Spec AR-15 Magazine Catch Button All AT3 Tactical lower receiver parts meet or exceed Mil Spec. The magazine catch button is no exception. Steel construction with proper threading and dimensions,...10 Options -
AT3™
AT3™ Mil-Spec AR-15 Bolt Catch Pin
Mil-Spec AR-15 Bolt Catch PIN Looking for a high-quality Bolt Catch Pin for your AR-15? Look no further than AT3 Tactical. Our bolt catch pin is designed to meet or... -
AT3™
AT3™ Mil-Spec AR-15 Disconnector Spring
Mil-Spec AR-15 Disconnector Spring Looking for a durable and reliable Disconnector Spring for your AR-15 trigger? Look no further than AT3 Tactical. Our Disconnector Spring is designed to meet or... -
AT3™
AT3 Tactical AR-15 Ambidextrous Safety Selector Assembly
Ambidextrous Safety Kit for AR-15 An ambidextrous safety selector is an easy, effective upgrade for modernizing your AR-15. This safety assembly features an easy-to-install safety drum, with an additional lever...10 Options -
AT3™
AT3™ Mil-Spec AR-15 Safety Selector – 10 Colors Available
Mil-Spec AR-15 Safety Selector The classic mil-spec safety selector is a great choice for any shooter. Featuring all steel construction, a 90 degree throw for safe and fire, and a...10 Options -
Strike Industries Ultra Light Takedown Pins for AR15
Ultra-Light Take Down Pins For Custom Rifle Builds The Strike Industries Ultra Light Takedown Pins is a cost-effective but durable solution in reducing the weight of AR-15 ideal for custom...4 Options -
AT3™
AT3™ Mil-Spec AR-15 Trigger Guard Roll Pin
Mil-Spec AR-15 Trigger Guard Roll Pin All AT3 Tactical lower receiver parts meet or exceed Mil Spec. These parts are guaranteed to fit and function in your AR trigger guard... -
AT3™
AT3™ Mil-Spec AR-15 Hammer/Trigger Pins – 2 Pcs
Mil-Spec AR-15 Hammer/Trigger Pins (2 Pieces) All AT3 Tactical lower receiver parts meet or exceed Mil Spec. These parts are guaranteed to fit and function in your AR trigger assembly... -
Strike Industries Extended Bolt Catch for AR15
A "Go Fast" Addition To Your Next Build The Strike Industries Extended Bolt Catch is a heavy-duty and reliable upgrade that makes your AR-15 quicker and easier to operate. It... -
AT3™
AT3™ AR 15 Enhanced Lower Parts Kit with Nickel Teflon Trigger – No Grip...
Tired of swapping out parts? Build the lower you actually want. This premium lower parts kit features our AT3 Enhanced Nickel Teflon Trigger, giving you the quality trigger your rifle... -
AT3™
AT3™ Enhanced Lower Parts Kit with Nickel Teflon Trigger and Magpul MOE Grip for...
Enhance your AR with a superior trigger and grip with AT3 and Magpul This high quality lower parts kit features our AT3 Enhanced Nickel Teflon Trigger, with a Magpul MOE...10 Options -
Armaspec AR-15 Superlight Gun Builders Kit – ARM251
Lightweight AR-15 LPK with Anti-Rotation Pins The Armaspec AR-15 Superlight Gun Builders Kit was developed to further customize and improve the performance of your AR-15 build. It utilizes and provides...6 Options -
AT3™
AT3™ 2-Stage AR 15 Lower Parts Kit with Nickel Boron Trigger – No Grip...
Experience the difference a 2-Stage Trigger makes in your next build. AT3 is pleased to offer the dependability of our Pro-Builder Lower Parts kit with the 2-Stage Nickel Boron Trigger.... -
Aero Precision M5 Lower Parts Kit – No FCG or Pistol Grip
Everything You Need For Your AR-308 Build Without The Grip & FCG The Aero Precision M5 Lower Parts Kit includes everything you need to assemble your AR-308 stripped lower receiver... -
AT3™
AT3™ Mil-Spec AR-15 Disconnector
Mil-Spec AR-15 Steel Disconnector All AT3 Tactical lower receiver parts meet or exceed Mil Spec. These parts are guaranteed to fit and function in your AR trigger assembly and are... -
Strike Industries Enhanced Bolt Catch for AR15
Features An Extra-Wide Bolt Catch Lever For A Smoother Shooting Experience The Strike Industries Enhanced Bolt Catch is an exceptional upgrade for AR-15 builds, which features an extra-wide bolt catch... -
AT3™
AT3™ Enhanced Mil-Spec AR-15 Hammer
Mil-Spec AR-15 Hammer, Coated with Nickel Teflon All AT3 Tactical lower receiver parts meet or exceed Mil Spec. These parts are guaranteed to fit and function in your AR15 or... -
AT3™
AT3™ Mil-Spec AR-15 Hammer Spring
Mil-Spec AR-15 Hammer Spring Looking for a durable and reliable Hammer Spring for your AR-15 trigger? Look no further than AT3 Tactical. Our Hammer Spring is designed to meet or... -
Luth-AR AR10 Lower Parts Kit
Luth-AR AR10 Lower Parts Kit Get your AR10 closer to being range ready with the Luth-AR AR10 Lower Parts Kit. Compatible with all mil-spec AR10 and SR25 lower receivers, this... -
Armaspec Gun Builder’s Stainless AR-10 Lower Parts Kit
Armaspec has the Perfect Lower Parts Kit To Finish Your Next AR-10 Rifle The Armaspec Gun Builder’s Stainless AR-10 Lower Parts Kit are high-quality parts combined in a single package...7 Options7 Options7 Options -
AT3™
AT3™ Mil-Spec AR-15 Trigger Spring
Mil-Spec AR-15 Trigger Spring All AT3 Tactical lower receiver parts meet or exceed Mil Spec. These parts are guaranteed to fit and function in your AR trigger group and are... -
Aero Precision M5 .308 Bolt Catch for AR-10
Ideal Bolt Catch Replacement For Your M5 .308 Builds The Aero Precision M5 .308 Bolt Catch is a great addition to beef up your next AR-10 rifle. This bolt catch... -
CMC Triggers Anti-Walk AR-15 Trigger Pin Set – Small
Ready-To-Go Option For AR Builders Who Demand Exceptional Trigger-pull Dynamics The CMC Triggers Anti-Walk Trigger Pin Set is a fully self-contained and ready-to-go option for AR enthusiasts who demand exceptional... -
Aero Precision M5 .308 Pivot Pin
Ideal Pivot Pin Replacement For Your M5 .308 Builds The Aero Precision M5 .308 Pivot Pin is custom designed specifically for use with the M5 series of AR-10 lower receivers....
Other Lower Parts Kit for AR-15:
Lower Receiver Part Kits
Mag Release
Other Lower Parts
Safety Selector
Bolt Catch
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