Magpul Magpul Mil-Spec Steel Castle NutAR-15

Specifications

Mfr data
Weight
0.66 oz
finish
Phosphate
material
High Carbon Steel
mil spec
Yes
warranty
Manufacturer's warranty
wrench size
Standard AR-15 castle nut wrench
staking type
Traditional staking notches
thread pitch
1-3/16-16 TPI
color options
Black
compatible with
Mil-spec carbine buffer tubes
country of origin
USA
MagpulLCL-P-6590

Magpul Mil-Spec Steel Castle Nut

Magpul is synonymous with high-quality polymer and metal AR-15 components, and while they are best known for their stocks and grip panels, their mil-spec hardware components like the castle nut are built to the same exacting standards.

Castle Nut0.66 oz
Best price today$6.95
Best price

Price comparison — 3 offers

By price
Unknown RetailerBest price
$6.95
Magpul DirectStale
$4.95Buy →
Primary ArmsStale
$6.95Buy →

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

XTS

XTS Castle Nut, Black CN

Castle Nut$4.99

Luth-AR

Luth-AR Lock Ring/Castle Nut, Carbine, MBA-3 & 4 Car Buff Kits Only, Black, CS-02

Castle Nut$4.99

Midwest Industries

MI AR Receiver Extension Lock Ring (M4BSTK-CN)

Castle Nut$5.00

Phase 5

Phase 5 AR-15 Receiver Extension Castle Nut

Castle Nut$5.00

ZRODelta

ZRODelta Mil-Spec Castle Nut, Black, Small, 7062-0003-1370

Castle Nut$4.49

VLTOR

VLTOR Receiver Lock Nut (Castle Nut)

Castle Nut$5.50