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Picture of ADM Light Weight Castle Nut-Purple Anodized

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ADM Light Weight Castle Nut-Purple Anodized

ADM Aluminum Castle Nut for the AR15/M4 Platform.

This Castle Nut does not have notches to stake the endplate. We reccomend VC3 Vibratite on the castle nut threds to secure it to the receiver extension.

Item No: LP06-PRP
Out of stock
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Machined from aircraft grade aluminum, with a fluted design to provide weight savings.

Installation Note:

We recommend wrapping the Castle Nut with Blue Painter's Tape to maintain the finish and reduce marring during installation. Due to the design, the Castle Nut cannot be staked, however we recommend applying VC-3 Vibratite to the threads and tightening it down snug. No torque wrench required, just tighten about 1/4 turn from hand tight. This is much less than your typical Castle Nut. The Castle Nut can be damaged if over tightened. The use of VC-3 Vibritite will result in a solid lockup, and prevent the Castle Nut from loosening.

Weight- 0.25oz

FFL Terms and Conditions - Any items placed on the same order as a firearm/lower receiver will also be shipped to the FFL. If you would like additional items shipped to you directly, please place them on a separate order. To expedite your order, please have your dealer fax or email their FFL to us. If the dealer you are using to transfer a firearm has not sent us a currently updated FFL to put on file, there will be an extended period of time needed to process your order. Due to the high volume of orders, please allow up to two weeks for delivery of firearms. Email:

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