Strike Industries AR Enhanced Castle Nut & Extended QD End Plate, Black - SI-AR-ECN&EEP-BK
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Strike Industries
Overview
The Strike Industries AR Enhanced Castle Nut & Extended QD End Plate is designed to secure your buffer tube while offering a Quick Detach (QD) point for slings. The castle nut ensures a reliable attachment, while the extended end plate adds versatility for mounting accessories. This setup is commonly found in builds featuring a mid-length gas system chambered in 5.56 NATO, providing a well-balanced performance for a variety of applications.
Specifications
Strike Industries AR Enhanced Castle Nut & Extended QD End Plate, Black - SI-AR-ECN&EEP-BK
Available Merchants(4)
Prices checked
Price Alert
Build history on GunPartPicker
It was hard to find in October 2026, in stock on only 8 of the 16 days we checked, and today 3 of the 4 retailers we track have it in stock. Prices barely moved in October 2026, holding around $57.95, with no real sale all month. Buying today, the lowest price is $57.95 at Brownells, which matches the best price we saw in October.
Prices checked · refreshed daily across 37 retailers
Builds Featuring This Part
See all builds →Builds in the community that include the Strike Industries AR Enhanced Castle Nut & Extended QD End Plate, Black - SI-AR-ECN&EEP-BK
| Build | Parts | Total |
|---|---|---|
 | 25 | $1794.28 |
 | 17 | $1408.77 |
 | 25 | $2466.07 |
 | 27 | $3444.02 |
 | 29 | $3898.73 |
 | 25 | $2052.10 |
 | 23 | $1893.39 |
 | 30 | $4092.52 |
| 29 | $3852.55 |
 | 29 | $2049.20 |
 | 22 | $1669.78 |
 | 16 | $1127.90 |
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