Rival Apollo 4.25" K26 (Hand cut, one end squared)
Rival Apollo 4.25" K26 (Hand cut, one end squared)

Rival Knockout Spring (125FPS)

Regular price $5.00 Sale

This precut Rival Knockout from the K25 spring is the perfect upgrade mod for your blaster for greater speed and accuracy. This mod is not for young kids as you'll need to compress the spring a bit when installing in the plunger tube! You can lose the plastic pieces in the handle but everything else should stay where it's at; you only need to remove the plunger tube. Use a flat head screwdriver to remove the cover off the notches and be careful as it sits on a pretty tight fit. This spring has been custom cut and tested to fit the Rival Knockout blaster.

• Easy to Medium difficulty on installation
• One end will be flat/squared, the other will be a raw cut.
• Average 125 FPS

• Cut-to-Length Compression Spring,
• Material: Made in the USA of USA spring-tempered steel
• Dimensions: About 130mm Long, hand cut, flat on one end.


Customer Reviews

Based on 3 reviews
Jacob Braniger
Be careful not to over do it

This spring is very, very powerful. So powerful, in fact, that it sheared the plastic connecting the plunger to he plunger head when I accidentally dry fired it. However, my knockout was a TKO with the air restrictor removed, so your mileage may vary. The few shots I did get through it before it broke were amazing though.

Shane Ferrell
Great spring! Puts fear back into my coworkers!

Fast shipping, would buy from OOD again.

Cashed Bastion
25kg Knockout spring

Out of darts did a great job packing and shipping both my orders..... but were here to talk spring power.

The installation was easy and quick (about 3m total) and now the blaster fires quicker and more accurately with a cool/scary new sound.

Please remember that this is not an upgrade for younger players and IMO you should always test a blaster on yourself before firing at others. (too strong for kids or pets) that being said I totally recommend this 25kg spring it's a super fun and easy mod.