AT3 Tactical Lower Receiver Parts
Get the Best Value for your AR-15 Lower Receiver Components from AT3 Tactical
AT3 Lower Receiver Parts Kit
AT AT3 Tactical, we know how crucial your lower receiver components are in building the ultimate AR-15. That’s why our AT3 Lower Receiver Components have the best quality in terms of function, durability, and reliability.
Show In-Stock Only?
Price
List
Grid
-
AT3™
AT3™ FU-BAG™ AR-15 Lost Parts Kit – Springs, Detents, Replacement Components
Made an "Oops" with your New Build? You Detent-Launchin', Spring-Losin' Fool, you. We've all been there. Whether it's rolling the dice on that bargain bin LPK in your local...2 Options -
AT3™NEWUpgrade Sale!
AT3 Tactical AR-15 Ultimate Cerakote Color Upgrade Kit
Cerakote Color Accent Parts Kit with Buffer Tube and Ambi Safety The Ultimate Cerakote Color Upgrade Kit completely overhauls your lower receiver, from takedown pins to buffer tube. Enhance function...8 Options8 Options8 Options$99.99$89.99 -
AT3™
AT3™ Mil Spec AR-15 Buffer Tube – 10 Colors Available
Mil-Spec AR-15 Carbine Buffer Tube Made 6061-T6 aluminum construction with a black anodized finish, with six precision-machined notches to securely lock your stock into position. This buffer tube has a...10 Options -
AT3™NEWUpgrade Sale!
AT3 Tactical AR-15 Cerakote Color Upgrade Kit
Cerakote Color Accent Parts Kit Cerakote color parts for your AR-15 can enhance your build and help you stand out, or blend in. This Cerakote parts kit includes replacements for...8 Options8 Options8 Options$27.99$25.19 -
AT3™
AT3™ MOTHERFU-BAG™ – The BIG AR-15 Lost Parts Kit – Springs, Detents, Wear Parts,...
Launch a detent? Snap a spring? Don't get mad, just fix it with this AR-15 Lost Parts Kit! Alright, so y'all seem to like the FU-BAG. Like a lot. Which... -
AT3™
AT3 Tactical AR-15 Magazine Catch and Button Assembly
AR-15 Magazine Catch with Button and Spring Whether you're finishing a build or replacing stock parts, your AR-15 is going to need reliable magazine retention. This mil-spec assembly includes the...10 Options -
AT3™RECOMMENDEDUpgrade Sale!
AT3™ Pro-Builder™ AR-15 Lower Parts Kit – No Grip or Trigger Assembly
Perfect Lower Parts Kit for the Premium Builds This quality lower parts kit excludes the two most commonly upgraded components - the grip and the trigger assembly (fire control group)....10 Options -
AT3™
AT3™ Mil Spec Buffer Tube Kit For AR-15 – 10 Colors Available
The perfect kit for your next build - at a price that can't be beat. This Mil-Spec AR-15 Buffer Tube Kit includes the buffer tube, castle nut, lock plate, 3oz...10 Options -
AT3™
AT3 Tactical AR-15 Bolt Catch Assembly with Spring, Plunger, and Roll Pin
Mil-Spec AR-15 Bolt Catch with Hardware The AT3 AR-15 Bolt Catch Assembly has everything you need to upgrade or replace an existing bolt catch on your AR-15 lower. You get...10 Options -
AT3™RECOMMENDED
AT3™ AR-15 Enhanced Billet Trigger Guard Assembly
AT3 Billet Trigger Guard - Perfect for Winter and Gloves This billet aluminum trigger guard works with all mil-spec lower receivers, and makes additional room for manipulating the trigger. The...9 Options -
AT3™
AT3™ Ambidextrous AR15 Safety Selector – 10 Colors Available
A Quick Upgrade to Any AR-style Rifle The AT3 AR-15 Ambidextrous Safety Selector replaces your existing selector all allows for enhanced safety control for both right- and left-handed shooters. This...10 Options -
AT3™RECOMMENDED
AT3 Tactical 2 Stage Trigger Assembly for AR 15 – 4.5 lb Pull Weight
The Best Upgrade To Your AR-15 - Your Key To Faster And More Accurate Shooting! The AT3 2-Stage Trigger drops into your mil-spec lower for a huge upgrade to your... -
AT3™
AT3™ AR15 Mil-Spec Bolt Catch – 10 Colors Available
Mil-Spec AR-15 Bolt Catch The bolt catch is an essential part of what makes the AR15 such a great rifle. AT3's bolt catch is a great addition to your next...10 Options -
AT3™
AT3™ Enhanced Nickel Teflon AR-15 Trigger Assembly
A Simple Upgrade That Will Ultimately Improve The Accuracy And Performance Of Your AR The Enhanced Nickel Teflon trigger assembly features smooth, precision-machined engagement surfaces and Nickel Teflon coating that... -
AT3™
AT3 Tactical AR-15 Safety Selector Assembly with Spring and Detent
AR-15 Safety Selector with Spring and Detent AT3's AR-15 Safety Selector Assembly comes with everything you need to install a new safety or replace your existing parts. This mil-spec style...10 Options -
AT3™
AT3™ Mil-Spec AR-15 Pivot Pin – 10 Colors Available
Mil-Spec AR-15 Pivot Pin This heavy-duty Mil-Spec Pivot Pin securely locks into and holds the upper and lower receivers in place. This US made pin is made of 8620 Alloy...10 Options -
AT3™
AT3™ Mil-Spec AR-15 Bolt Catch Spring
Mil-Spec AR-15 Bolt Catch Spring All AT3 Tactical lower receiver parts meet or exceed Mil Spec. These parts are guaranteed to fit and function in your AR lower receiver and... -
AT3™
AT3™ Mil-Spec AR-15 Takedown Pin – 10 Colors Available
Mil-Spec AR-15 Takedown Pin The AT3 AR-15 Takedown pin is perfect for replacing a lost part or starting a new build. It has steel construction with a long-lasting phosphate finish,...10 Options -
AT3™
AT3™ Mil-Spec AR-15 Magazine Catch – 10 Colors Available
Mil-Spec AR-15 Magazine Catch This magazine catch meets and exceeds mil-spec demands. Steel construction with proper threading and dimensions, plus a durable Melonite finish to lasting wear protection. If you...10 Options -
AT3™
AT3™ Mil-Spec AR-15 Buffer Retainer
AT3 Tactical Mil-Spec AR-15 Buffer Retainer If you're looking for a reliable buffer retainer for your AR-15, look no further than the Mil-Spec AR-15 Buffer Retainer from AT3 Tactical. Made... -
AT3™
AT3™ Mil-Spec AR-15 Bolt Catch Plunger
Mil-Spec AR-15 Bolt Catch Plunger Looking for a high-quality bolt Catch Plunger for your AR-15? Look no further than AT3 Tactical. Our Bolt Catch Plunger is designed to meet or... -
AT3™
AT3™ Mil-Spec AR-15 Magazine Catch Spring
Mil-Spec AR-15 Magazine Catch Spring All AT3 Tactical lower receiver parts meet or exceed Mil Spec. These parts are guaranteed to fit and function in your AR mag catch assembly... -
AT3™
AT3™ Mil-Spec AR-15 Pistol Grip Screw
AT3 Mil-Spec AR-15 Pistol Grip Screw Looking for a reliable replacement for your lost or damaged AR-15 Pistol Grip Screw? Look no further than AT3 Tactical. Our Mil-Spec AR-15 Pistol... -
AT3™
AT3™ Mil-Spec AR-15 Pistol Grip Lock Washer
Mil-Spec AR-15 Pistol Grip Lock Washer If you're looking for a Pistol Grip Lock Washer that meets or exceeds Mil-Spec, look no further than AT3 Tactical. Our lock washers are...
Get the Best Value for your AR-15 Lower Receiver Components from AT3 Tactical
AT3 Lower Receiver Parts Kit
AT AT3 Tactical, we know how crucial your lower receiver components are in building the ultimate AR-15. That’s why our AT3 Lower Receiver Components have the best quality in terms of function, durability, and reliability.
Back to top