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Critical Handguard Stabilization
The Gun Engineer Quad Rail End Cap delivers essential stability for your AR-15’s free-float system by mechanically locking the handguard against the receiver interface. This precision-engineered component prevents clocking movement during rapid-fire engagements or impact scenarios, maintaining consistent accessory alignment while creating a debris-resistant barrier at the assembly boundary.
Manufactured from aerospace-grade aluminum and protected by MIL-Spec hardcoat anodization, it withstands thermal expansion cycles and friction wear without compromising dimensional integrity.
Securement Features:
- Rotational Lock Design – Keyed interface prevents torque-induced handguard movement
- Precision Mating Surfaces – Machined to ±0.002″ tolerance for zero-gap assembly
- Debris Exclusion Flange – Seals handguard-receiver junction against particulate intrusion
- 6061-T6 Aluminum Core – Optimal strength-to-weight ratio without barrel harmonics effect
- Thermal Expansion Compensation – Radial gaps accommodate barrel heat transfer
- MIL-A-8625F Anodization – Type III Class 1 finish for permanent corrosion resistance
Specifications
| Parameter | Value |
|---|---|
| Material | 6061-T6 Aluminum |
| Finish | Black Hardcoat Anodized |
| Fitment | Standard Free-Float Quad Rail Handguards |
| Mounting Method | Slip-Fit Compression Ring |
| Weight | 0.6 oz (17 g) |
| Dimensions | 1.35″ OD × 0.32″ H |
| Compatibility | AR-15 Free-Float Systems |
| Country of Origin | Malaysia |
Manufactured in Malaysia by Gun Engineer, ensuring precision and reliability.
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