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AR-15 Billet Castle Nut Black
AR-15 Billet Castle Nut Black
AR-15 Billet Castle Nut Burnt Bronze
AR-15 Billet Castle Nut Burnt Flat Dark Earth
AR-15 Billet Castle Nut Burnt OD Green
AR-15 Billet Castle Nut Black
AR-15 Billet Castle Nut Black
AR-15 Billet Castle Nut Burnt Bronze
AR-15 Billet Castle Nut Burnt Flat Dark Earth
AR-15 Billet Castle Nut Burnt OD Green
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FORWARD CONTROLS DESIGN LLC - AR-15 BILLET CASTLE NUT

3 Reviews
Color
Brownells #
100044403, 100044404, 100044405, 100044406
MFR #
CNF (CASTLE NUT, CNF (CASTLE NUT, CNF (CASTLE NUT, CNF (CASTLE NUT
UPC
682318760526, 680665827244, 680665827251, 680665827268
$19.00 - $28.50
Coupon Code
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Estimated delivery: Sep 17
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What is the FORWARD CONTROLS DESIGN LLC - AR-15 BILLET CASTLE NUT?

The TDP spec castle nut is a simple and robust fastener that is almost perfect for the job it's tasked to perform. CNF (Castle Nut, Forward Controls) is based on the TDP spec castle nut, with now 4 staking notches that are longer and deeper (30 degrees notch vs. TDP castle nut's 45 degrees) and coarse serrations on the wrench side of the nut. The CNF has longer and deeper notch that once installed and staked, will not loosen without the user's deliberate action. CNF is billet machined in 4140 PH steel, and black nitrided. As with everything Forward Controls Design produces, it is proudly made in the USA.

  • 4140 billet steel
  • AR15M16 castle nut
  • Improved staking notches
  • Color: Black, Burnt Bronze, FDE, OD Green

See all of our AR15s and AR15 parts here.

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AR-15 BILLET CASTLE NUT REVIEWS

5.0
3 Reviews
5 Stars
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5
Great castle nut
I have one of these on all my rifles. It's well made and looks great.
by BENJAMIN D. on April 09, 2026
Verified Purchase
Was this review helpful? 0
5
Shiny
Works as intended and fast shipping. Definitely a fancy version of a castle nut
Would you recommend this? Yes, I would recommend to a friend
by Ronald D. on February 22, 2025
Verified Purchase
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5
Works perfect
I used it to secure my buffer tube and my ambi sling attachment to my receiver and buffer tube
by Quizz on July 22, 2021
Was this review helpful? 3
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