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UTG Mil-Spec 6 Position Receiver Extension Tube Kit, Matte Black

SKU: UTTLU001KIT MFR: TLU001-KIT
$37.97
$44.97
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Key Features

  • Enhance your AR-15 with this durable UTG Mil-Spec receiver extension tube kit.
  • Get superior compatibility with this 6-position extension tube for your AR platform.
  • Enjoy lasting value with the included carbine buffer and receiver end plate.
  • Ensure accuracy and reliability with this Mil-Spec buffer spring and castle nut.
  • Experience ease of use with simple installation of this complete extension tube kit.
  • Backed by UTG's Lifetime Limited Warranty, this kit offers peace of mind and value.
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Special Order?Estimated to Ship: 08/08/2025
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Questions & Answers

Reviews about this item

Review Summary

2019-05-29T10:57:49

Rated 5 out of 5

Product

I would like to say thank you for your product but I already sent a review and I don’t understand why I have just sent another one now I’m not into reviews unless I care about the product and I already told you what I thought about the product and today is not a good time to be talking to anybody I’m in really bad shape I cannot do anymore but that you already if somebody didn’t read my review by now it’s very unfortunate you need to get somebody new because it’s already been a few days and you still haven’t reviewed it yes

John C.

2018-08-07T14:18:50

Rated 5 out of 5

Buffer Tube

Best price found and quick on the shipping.

William C.

2018-01-25T10:52:11

Rated 4 out of 5

It should fulfill its function

Haven't had a chance to use it yet. It appears as though it should fulfill its function. Looks clean. Haven't noticed any flaws.

Clint S.

2018-01-02T09:07:05

Rated 5 out of 5

Great parts at great price

Works as expected, seems like good quality. But stock fits nicely. Good quality at a good price.

Julian G.

2017-09-11T14:42:37

Rated 5 out of 5

Great customer service

Got a great price on what i ordered and it was promptly shipped to me. Great customer service.

Michael R.

2017-09-05T09:10:19

Rated 5 out of 5

Just what I needed

I needed a FDE tube to finish my latest build, this kit is a nice unit, fit and finish are great.

David Y.

2017-07-26T09:26:27

Rated 5 out of 5

Would highly recommend this set up

This was a very nice upgrade to my ar-14

Miki*Bennett M.

2017-07-16T21:23:10

Rated 5 out of 5

Awesome!!

Great product!

Justin T.

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UTG Extension Tube Kit Specifications

  • Material

    Aluminum

  • Dimensions (HxW)

    1.45 x 7.25" (3.68 x 18.42cm)

  • Weight

    9.3 oz (263.65g)

  • UPC Code

    4717385551961

About UTG Extension Tube Kit

FEATURED REVIEWS

Product

By John C.

I would like to say thank you for your product but I already sent a review and I don’t understand why I have just sent another one now I’m not into reviews unless I care about the product and I already told you what I thought about the product and today is not a good time to be talking to anybody I’m in really bad shape I cannot do anymore but that you already if somebody didn’t read my review by now it’s very unfortunate you need to get somebody new because it’s already been a few days and y...

View full Review

Buffer Tube

By William C.

Best price found and quick on the shipping.

When it comes to enhancing your firearm's performance and adaptability, the Mil-Spec 6 Position Receiver Extension Tube Kit in Matte Black stands out as a superior choice. Proudly made in the USA, this kit features a 6-position, mil-spec diameter receiver extension tube, expertly CNC machined from 6061-T6 aircraft-grade aluminum. This high-quality material ensures the product's durability and reliability, even under frequent use.

The extension tube boasts precisely rolled threads, designed for robust thread engagement with the lower receiver. This meticulous design detail enhances the product's longevity and ensures a secure fit, making it a reliable addition to your firearm accessories.

The stylish matte black finish is achieved through a Type III Class II hard coat anodize process, adding an extra layer of protection and a sleek, professional look to your firearm. This versatile kit is not just about the extension tube; it also includes a carbine buffer, buffer spring, receiver end plate, and castle nut.

Whether you're a long-range shooter or someone who prefers using scopes or sights with a longer eye relief, this receiver extension tube kit is designed to increase the length of your rifle's receiver, making it a versatile and practical choice for various firearms. Trust in the quality and expertise of UTG, a renowned name in gun stocks and accessories, to deliver a product that meets your shooting needs.

UTG Extension Tube Kit Features

  • Mil-Spec 6-position receiver extension tube kit for firearm customization
  • CNC machined from 6061-T6 aircraft-grade aluminum for maximum durability
  • Matte black Type III Class II hard coat anodized finish for a sleek appearance
  • Precisely rolled threads ensure secure and durable engagement with lower receiver
  • Comprehensive kit includes buffer, spring, end plate, and castle nut for full setup
  • Designed and made in the USA by UTG, specialists in gun stocks and accessories

Warranty Information

This product has a limited lifetime warranty.

Key Features

  • Enhance your AR-15 with this durable UTG Mil-Spec receiver extension tube kit.
  • Get superior compatibility with this 6-position extension tube for your AR platform.
  • Enjoy lasting value with the included carbine buffer and receiver end plate.
  • Ensure accuracy and reliability with this Mil-Spec buffer spring and castle nut.
  • Experience ease of use with simple installation of this complete extension tube kit.
  • Backed by UTG's Lifetime Limited Warranty, this kit offers peace of mind and value.

What's in the box:

  • UTG Mil-Spec 6 Position Extension Tube
  • Carbine Buffer
  • Buffer Spring
  • Receiver End Plate
  • Castle Nut
  • UTG Lifetime Limited Warranty