Product Description
Colt M4/AR15 Receiver Extension Castle Nut P/N: 9390020 Supersedes: 64069, 62357
Factory Colt castle nut for the carbine receiver extension (buffer tube). Locks the extension and end plate to the lower receiver.
Current Colt number is 9390020. Same nut previously sold as 64069 and 62357.
Features
- Genuine Colt factory castle nut
- For M4 / AR-15 carbine receiver extensions
- Secures the buffer tube and receiver end plate
- Current P/N 9390020
- Replaces 64069 and 62357
- Sold individually
Specs
- Manufacturer: Colt
- Current part number: 9390020
- Old part numbers: 64069, 62357
- Type: Receiver extension castle nut
- Platform: M4, AR-15 carbine
- Fit: Standard carbine receiver extension
This is the castle nut only. Receiver extension, end plate, and stock are sold separately.
Product Videos
Custom Field
Product Reviews
35 Reviews Hide Reviews Show Reviews
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Colt
Great fit and finish.
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A+
A+
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Great replacement
If your building a new build or replacing an old existing part, look no further, this is what you need.
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Colt castle nut
Quality part; fit and finish is perfect. Colt's has the notches for proper staking of the end plate. As always, great AU service!
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Colt Receiver Extension Castle Nut
My Colt castle nut was shipped fast and is typical Colt quality. AU is my go to for Colt products.
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Colt quality, great price
High quality mil-spec part. A.U. Great company.
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First Purchase
I needed an extra castle nut, preferably Colt brand, and Arms Unlimited had it at the best price, with free shipping to boot.
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Colt Parts
Always top notch parts, AU always efficient with fast service.
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Colt M4/AR15 Receiver Extension Castle Nut
AU sells authentic Colt parts and the Colt M4 Receiver Extension Castle nut is no exception. Castle nut was brand new. The exceptional things about AU are their customer service, best prices on Colt products, fast shipping and no tax!
