Aero Precision Aero Precision Receiver Extension Lock NutAR-15

Specifications

Mfr data
Weight
0.50 oz
finish
Anodized
material
Steel
mil spec
Yes
warranty
Limited lifetime
wrench size
Standard AR-15 castle nut wrench
staking type
Traditional staking notches
thread pitch
1-3/16-16 TPI
color options
Black,FDE,ODG,Anodized Color Options
compatible with
Mil-spec carbine buffer tubes,Commercial carbine buffer tubes
country of origin
USA
Aero PrecisionLCL-P-6579

Aero Precision Receiver Extension Lock Nut

Aero Precision's castle nut is a consistent bestseller among AR-15 builders who want a trusted OEM-quality component at an accessible price. Made in the USA to mil-spec dimensions, it works with both mil-spec and commercial carbine buffer tubes and features recesses for standard staking.

Castle Nut0.50 oz
Best price today$10.00
Best price

Price comparison — 3 offers

By price
Unknown RetailerBest price
$10.00
Primary ArmsStale
$8.99Buy →
Aero Precision (Direct)Stale
$10.00Buy →

Affiliate disclosure: Loadout Combat Lab may earn a commission from qualifying purchases made through retailer links. Rankings are by price — never sponsored.

← Back to parts

Fits These Platforms

AR-15

Similar Parts

Spike's Tactical

Spike's Tactical Lightweight Chromoly Castle Nut (SLA501N-LW)

Castle Nut$8.96

Spikes Tactical

Spikes Tactical Castle Nut - Lightweight - Phosphate, SLA501N-LW

Castle Nut$9.19

BCM

Castle Nut

Castle Nut$8.64

WMD Guns

WMD Guns Castle Nut, Nitromet, Black, 1-NMCN

Castle Nut$9.49

WMD Guns

WMD Guns Castle Nut, NiB-X, Nickel, 1-NIBXCN

Castle Nut$9.89

Geissele

Geissele Premium Mil-Spec Castle Nut

Castle Nut$9.95