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KAK AR-15 Mil-Spec Castle Nut Additional Features: w/Staking Cuts,

KAK AR-15 Mil-Spec Castle Nut w/Staking Cuts AR15-LP-057
KAK AR-15 Mil-Spec Castle Nut w/Staking Cuts AR15-LP-057
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KAK AR-15 Mil-Spec Castle Nut w/Staking Cuts AR15-LP-057

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Questions & Answers
Will this work on the SB A4 Tactical brace. I am installing it on a Mossberg 590 Shockwave Expert Answer

This castle nut will work for a mil-spec or commercial buffer tube, which is what the SBA4 uses.

by Nick B., Gear Expert, June 4, 2021
Is the finish matted or glossy? Also, is the color a deep black or is it the grayish black parkerized color? Expert Answer

These are a deep matte black color.

by Nick B., Gear Expert, June 4, 2021
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
What can ya say by Fred, Verified Owner, November 16, 2025
It's a castle nut. It works. It's the right shade. What can you really say. It's a nut.
2/2 found this helpful
Helpful Positive Review
Good price. Does what a castle nut does. by jeepvet, Verified Owner, November 26, 2025
Good price. Does what a castle nut does. Screws on and tightens up to hold the buffer tube in place.
1/1 found this helpful
Helpful Positive Review
Castle Nut by Wally11, September 14, 2020
Round and screwy. So basically just like Joy Behar, only useful. Mil Spec, good quality. Seems to be up to snuff. Buy before whoever is pulling Joe Biden's strings gets their curtains hung in the White House.
23/28 found this helpful
Helpful Positive Review
King of the castle by Rob, Verified Owner, August 17, 2024
Perfect basic castle nut and inexpensive. Flat finish matches most basic upper receivers
1/1 found this helpful
Helpful Positive Review
Mil-Spec Reasonable Priced Castle Nut by KenC, Verified Owner, January 6, 2022
Reliable, dependable, affordable and milspec. I’ve tried them all from an expensive or cheap variety of castle nut. But this one hit the spot, very affordable, reliable fits well with different types of endplates and buffer tubes. I even bought 10 of...
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2/2 found this helpful
Helpful Positive Review
Good Castle Nut by Jacob, Verified Owner, August 16, 2021
This is a legit, properly made AR-15 castle nut. The stake notches are ramped and are not "blind", as in, the notch in which you stake some of material of the end plate into has reduced volume/capacity since they're not cut all the way through.
3/3 found this helpful
Read All 25 Reviews
Additional Features:
w/Staking Cuts
Gun Model:
AR-15
Condition:
New

Code: 3KE-CAN-ARS-AR15-LP-057

MPN: AR15-LP-057

UPC: 000028049784

List: $5.00
$4.99

Product Info for KAK AR-15 Mil-Spec Castle Nut

Ar15 Mil-Spec Castle Nutimage

Hardened Steel

With Staking Cuts

Specifications for KAK AR-15 Mil-Spec Castle Nut:

Manufacturer: KAK Industry
Additional Features: w/Staking Cuts
Gun Model: AR-15
Condition: New

Package Contents:

  • KAK AR-15 Mil-Spec Castle Nut

What firearm models does the manufacturer say KAK AR-15 Mil-Spec Castle Nut is compatible with?

The manufacturer says that KAK AR-15 Mil-Spec Castle Nut is compatible with AR-15

KAK AR-15 Mil-Spec Castle Nut Orderable Models

List of Orderable Models

  • KAK AR-15 Mil-Spec Castle Nut w/Staking Cuts, AR15-LP-057 , MPN: AR15-LP-057 , UPC: 000028049784 , Code: 3KE-CAN-ARS-AR15-LP-057

KAK AR-15 Mil-Spec Castle Nut Unavailable & Discontinued Models

List of Unorderable Models

  • USED, KAK AR-15 Mil-Spec Castle Nut w/Staking Cuts, AR15-LP-057 , MPN: AR15-LP-057-EDEMO , Code: 3KE-CAN-ARS-AR15-LP-057-EDEMO-IN-C
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Last updated 2026-09-10 UTC.