We Ship Fast!

Order by 1PM CST for Same Day Shipping (Mon-Fri)

LBE Unlimited Buffer Tube for AR-15 – MILBUFKT

In Stock

90 Day No-Hassle Returns We Pay Return Shipping

We have a 90-day no-hassle return policy. We pay return shipping.

If you need to request a return, contact us at support@at3tactical.com and we will send you a return label

After 90 days, defective items will still be covered under the manufacturer’s warranty, where applicable.

Please refer to the product listing for warranty details. If you have specific warranty questions, contact us at support@at3tactical.com. We may direct you to pursue your warranty claim directly with the manufacturer.

Your satisfaction is our #1 priority

If you’re dissatisfied with your purchase, in any way, please contact us at support@at3tactical.com – we will do our best to make it right.

Fast & Free Shipping On orders over $50

You will receive fast, free shipping for all orders over $50

Shipping cost is $7.99 for orders under $50. We ship with UPS or USPS, depending on the item.

Most orders received by 1pm CST ship the same day

You will receive an email with tracking information at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses. Orders placed on weekends, holidays, or after 1pm will ship the following business day.

The LBE Unlimited Mil-Spec Buffer Tube Kit for the AR15 comes with a buffer tube, castle nut, lock plate, recoil buffer and recoil spring. Get all the parts you need with the MILBUFKT.


  • Mil spec lower receiver buffer tube extension kit
  • Aluminum construction – Light and strong


Material: Aluminum

Finish: Matte black

Includes: Buffer tube, castle nut, lock plate, recoil buffer and recoil spring

Not sure if you need Mil-spec or commercial buffer tube? The below image shows the difference in dimensions

Have Questions About this Product?

You have not viewed any product yet!

Customer Reviews

Based on 3 reviews
Buffer tube

Bought this part, along with a number of other parts from AT3 Tactical for my first build. Great product, shipped quickly, great customer service. Have yet to shoot it, so I can't speak to how well it is while shooting

Thanks for sharing your feedback, Jon. We're glad you're satisfied with your purchase. Cheers!
Great product

I bought it for my first build. Rock solid product, better than I expected for the price. AT3 got it out fast - I received it a day ahead of schedule! I highly recommend this product to anyone

We are glad to hear that you are happy with your order.
Buffer rude review

Fast shipping and quality, fit and price were all great. Good stock on hand I will order again.