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+ 12% Off Select AR15 Parts Use Code: ARBUILD12

AR-15 MBA-3/MBA-4 CARBINE CASTLE NUT

AR-15 MBA-3/MBA-4 CARBINE CASTLE NUT Reviews & Ratings

FITS: The Luth-AR Carbine Lock Ring/Castle Nut for MBA-3 and MBA-4 Carbine Buffer Kits, as well as any Mil-Spec or Commercial Carbine receiver extension.

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5 Stars
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4 Stars
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3 Stars
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2 Stars
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1 Stars
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5
Nice!
This castle nut worked great. Tightened to 40 ft/lbs and everything is strait and tight. The groves for staking are nice and deep, which allow for strong staking. Don’t be concerned with the low price, this item good to go.
Would you recommend this? Yes, I would recommend to a friend
by Chris on May 29, 2025
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3
A bit loose.
Not the best finish but acceptable. The main issue is the nut sits just a bit loose on a BCM buffer tube rather than a snug fit--there is a little wobble back and forth between threads. I give it 3 stars for dirt-cheap pricing.
by AH on August 23, 2023
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