Forward Controls Design CNF Billet Machined Castle Nut for A5 Length RE Black
$23.99 at OpticsPlanet · 5 stores
In stock Sale
Best price
$19.00at Brownells
In stock Lowest in 30 dayschecked Nov 10, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells Best price | $19.00checked Nov 10, 2026 | In stock | Buy at Brownells | |
| OpticsPlanet | $19.99Salechecked Nov 10, 2026 | In stock | Buy at OpticsPlanet | |
| Ammunition Depot | $23.99checked Nov 10, 2026 | In stock | Buy at Ammunition Depot | |
| Battlehawk Armory | $18.64Salechecked Nov 10, 2026 | Check store | Buy at Battlehawk Armory | |
| AR15Discounts | $19.00checked Nov 10, 2026 | Check store | Buy at AR15Discounts | |
| Dirty Bird | $19.00checked Nov 10, 2026 | Check store | Buy at Dirty Bird | |
| Palmetto State Armory | $19.99checked Nov 10, 2026 | Check store | Buy at Palmetto State Armory |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Lowest in-stock price in the last 30 days: $19.00 at Brownells. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| AR15Discounts | $19.00 | $19.00 | $19.00 |
| Ammunition Depot | $23.99 | $23.99 | $23.99 |
| Battlehawk Armory | $18.64 | $18.10 | $18.64 |
| Brownells | $19.00 | $19.00 | $19.00 |
| Dirty Bird | $19.00 | $19.00 | $19.00 |
| OpticsPlanet | $19.99 | $19.99 | $19.99 |
| Palmetto State Armory | $19.99 | $19.99 | $19.99 |
Since Sep 27, 2026.
About this part
The AR-15 Billet Castle Nut Black is an AR-15 buffer part from Forward Controls Design. It's sold by 7 stores (3 in stock), from $18.64 to $23.99. The lowest in-stock price in the last 30 days was $19.00 at Brownells.
Specifications
- Manufacturer
- Forward Controls Design
- Platform
- AR-15
- Material
- Steel
From the manufacturer
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 Mfg: Forward Controls Design
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