Machined from 4140 steel with a manganese phosphate coating, the Castle Nut is an excellent replacement part or is ideal when building new rifles. Locks your CAR buffer tube down secure.
Reviews
Average Rating:
( 21 )
Oscar Paez from Sterling, VA United States
November 25, 2025
CHIAPPA PAK-9 BRACE and BUTTSTOCK ADAPTER PAK-03
Great fit easy to install, looks great on my PAK 9.
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Tyson Young from Lake Jackson, TX United States
May 8, 2025
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Mark B from Jacksonville, FL United States
October 23, 2024
Excellent product, outstanding support
I went through a few permutations of the folding stocks available from CSS. To their great credit they patiently counseled me and in the end I wound up with an outstanding collapsible stock that fits my shorter than average arms perfectly.
