Leapers UTG PRO Mil-spec 6 Position Receiver Extension Tube Kit - Flat Dark Earth

Manufactured by Leapers UTG
Manufactured by Leapers UTG
10 Reviews

Out of Stock

NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.



UTG put these together just for us! Starting with the high quality TLU001 6-position receiver extension, they also supplied the buffer, buffer spring, castle nut, and end plate, all military specification parts! Now in Flat Dark Earth!

The receiver extension is mil-spec, so combine it with your favorite mil-spec compatible stock to finish out that lower receiver! All parts made in the USA.

  • Machined from durable 6061-T6 aluminum extrusions
  • High strength precision rolled threading
  • Type III hardcoat anodized finish
  • Accepts your favorite MIL-SPEC butt stocks
  • Includes buffer, buffer spring, end plate, and castle nut
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BrandLeapers / UTG
FinishHardcoat Anodized
Manufacturer.Leapers UTG
MaterialAluminum - 6061-T6

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

10 reviews

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High quality, great value.

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I was very happily surprised with the overall quality and value of this kit. The finish is excellent on all the parts. The buffer spring is vinyl coated, so it should be very quiet. I can only come up with some very minor criticisms. The castle nut is not as thick as most others I have used, but it will still do the job. The bumper on the buffer is a cheaper, harder material than others, but it still works. Very happy and would buy again if I need another kit for a build.

Good Quality for the Price

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My only complaint on this kit is the spring and the buffer. It's loud. I ended up installing this on my nephews build. I threw a little ALG Go-Juice on it and it reduced the sound. Ended up getting the Spike's setup for mine.


by -

The tube itself is fine, but the castle nut is plastic, and the spring is weak. I ended up ordering those two parts separately. Honestly, the nut was the real bummer, I could have dealt with the spring probably but I'm being anal about it. FDE colour is very close to Magpul FDE btw, but a slightly lighter perhaps. At the end of the day it's not noticeable though.

Nice FDE Tube

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I'll agree with another review that the buffer itself feels kind of cheap. I bought this for the FDE tube though, and I'm very pleased with it. Just a heads up, the picture on the site leads you to believe this tubes coloring may be a little "off", it's not, it's dead on FDE.

Excellent kit for your build


This assembly is well-made and the finish looks nice and uniform on the parts. The end plate and castle nut are a dark glossy black, which looks really nice compared to some other offerings which are typically anodized or parkerized.

Very nice

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Very nice quality and the finish is great.

“Mostly mil-spec”

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First off, the tube looks and fits great. The buffer looks and feels the same as any I used in the army, and while it is a bit loud, shooting is louder so that doesn’t bother me. The coated spring is a bit stiffer than any of worn out M4 springs I’ve used before, but I really like that since I’m using a higher caliber. Would absolutely buy again.

Great products, prices and fast shipping as usual from PRIMARY ARMS

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Used this in an 18" mid length gas .223 wylde build in fde.
<br>Near exact match to the fde on my aero precision receiver set. Functions great in this build.

Solid purchase

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I know Leapers is regarded as a “budget” brand, it im impressed with this kit. The FDE is spot on with Magpul and my Aero lower. The coating looks great. All quality parts. Even the castle nut is nicer than many others I’ve gotten in other buffer kits. Another review on here said he got a plastic castle nut. The castle nut I received is aluminum. I would absolutely buy this kit again.

Highly recommend

by -

Works perfectly. Only 200 rounds or so with it