Description

The HK SP5 Full-Size 3-Position FRT Trigger Housing is engineered to provide a rigid, precisely aligned interface for forced-reset trigger operation on full-length SP5 platforms manufactured by Heckler & Koch (HK).

The housing body is printed from carbon-fiber–reinforced ABS, selected for its balance of strength, heat resistance, and dimensional stability. Compared to standard polymer housings, carbon fiber reinforcement significantly reduces flex under load while maintaining a lightweight profile—critical for consistent selector engagement and repeatable trigger behavior.

To reinforce high-stress areas, dual metal plates are integrated at the fire control group (FCG) interface, adding rigidity and helping ensure precise internal alignment over extended use.

This full-size SP5 configuration includes a durable TPU(Thermoplastic Polyurethane) buffer is included for impact absorption and resilience under repeated cycling. An MP5 trip is also included which aids in the reset cycle, completing the system.

REQUIREMENTS / COMPATIBILITY

• SP5 FULL-SIZE platforms only

• HK MP5-pattern receiver of matching full-length configuration

• Properly configured fire control components

❌ Not compatible with SP5K (K/SK), mid-length variants, or SD models
⚠️ Verify model length before purchase

⚠️ This trigger housing is designed exclusively for FULL-SIZE SP5 platforms and is not compatible with SP5K (K/SK), mid-length, or SD variants.