Coast Knives Rapid Response 3.90 Black Spring Assisted Knife - Black Serr

Retail Price: $50.00
Our Price: $33.99
In Stock! Add to Wishlist
Item #BP-10528


  • Overall Length: 8.75"
  • Blade Length: 3.875"
  • Cutting Edge: 3.75"
  • Blade Material: 5Cr15Mov
  • Blade Style: Clip P0int
  • Blade Grind: Hollow
  • Blade Finish: Black
  • Edge Type: Serrated
  • Handle Length: 4.875"
  • Handle Material: Fiberglass Reinforced Nylon (FRN)
  • Handle Color: Black
  • Frame Material: Stainless Steel
  • Weight: 4.80 oz.
  • Pocket Clip: Right/Left Hand, Tip-Up
  • Knife Type: Spring Assisted
  • Opener: Thumb Stud
  • Lock Type: Plunge Lock
  • Brand: Coast
  • Model: RX321
  • Country of Origin: China
  • Best Use: Everyday Carry


The Rapid Response 3.90 utilizes the Blade Assist Technology. This spring assisted design uses a friction-reducing roller-bearing design to allow the blade to open quickly but smoothly while reducing spring load on all internal blade-assist components. The blade is black oxide coated stainless steel with a partially serrated edge and dual thumb studs for one-hand opening. The handle is built on stainless steel liners and features textured fiberglass-filled nylon scales and a simple liner lock tab. The Rapid Response has the Max-Lock™ safety button on the side of the knife’s handle; it can lock the blade in both the open and closed positions. The deep tip-up carry pocket clip is reversible. Ron Lake design.


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