DIRECTIONS FOR USE

SAFETY PRECAUTIONS

  1. ALWAYS WORK AWAY FROM OPEN FLAME AND HEAT SOURCES.

  2. STORE CAPS AND FIRECRACKERS SEPARATELY IN FLAME AND IMPACT RESISTANT CONTAINERS.

  3. DO NOT EXCEED ONE 6MMX35MM 1.4G PAPER FIRECRACKER!

  4. DO NOT MODIFY THE DEVICE. MODIFICATIONS MAY RESULT IN INJURY OR DEATH. USE AT YOUR OWN RISK!

  5. DO NOT STORE DEVICE LOADED. ONLY LOAD DEVICE WHEN READY FOR USE.

  6. DO NOT THROW AT HUMANS OR ANIMALS.

  7. ALWAYS OBTAIN CONSENT FROM ALL PERSONS IN THE IMMEDIATE VICINITY.

  8. ALWAYS WEAR HAND, EYE, AND EAR PROTECTION.

  9. NEVER “COOK OFF” A GRENADE.

  10. NEVER HOLD THE DEVICE AFTER ACTIVATION.

  11. USE AT OWN RISK! USER ASSUMES ALL LIABILITY.

INTRODUCTION

This grenade is designed as a novelty device and fires a toy cap similarly to a cap gun. The cap initiates the firing train by igniting a single paper-fused firecracker captured in a body designed as a safety standoff cage. This design prevents the user from direct contact with the firecracker while allowing enough interior volume for expanding gases to safely exit the vent holes instead of building pressure. 

The fuzing mechanism is a safety-improved redesign of the Russian UZRG family of fuzes with the main improvement being a secondary striker catch and movement of the safety pin across the striker channel to more effectively block undesired motion of the striker assembly.

Most parts of this grenade are designed to be replaceable as-needed with the main consumable being the firecracker holder itself. The anvil is expected to wear approximately 2mm at 60 firings. This will vary due to compositions in toy caps and corrosive fouling from the firecracker fuse. As wear exceeds 2mm, the grenade may become less relaible when igniting the cap.

The delay and reliability of the device will depend on the quality of cap and firecracker. FIRECRACKERS MUST BE PAPER FUSED. Some brands will have faster burning fuses than others and it is up to the end user to test and verify burn rates prior to installing them in the device.

WHAT CAPS SHOULD I USE?

Almost any plastic cap except for Parris 144 single shot caps will work. The Parris Single Shot Caps pictured below are pure garbage. I couldn’t even get them to go off with a hammer against concrete.

The best caps are blue auto strip caps made in Germany. These are the most consistent and the quality is better than anything else in box stores.

Everything else is somewhere in the middle. Both of these were purchased at Basspro. Ring caps from both 5 Below and Dollar Tree worked reliably, but explosive charges were sometimes inconsistent.

ASSEMBLY INSTRUCTIONS

Your training grenade ships partially disassembled. The spring will need to be installed. 

  1. Place Spring into Fuze Head.

  2. Place Striker Assembly through middle of Spring into Fuze Head as shown.

3. Using an unsharpened pencil or end of a pen, press the the bottom of the Striker Assembly into the Fuze Head until the head of the Striker Assembly is protruding from the top of the Fuze Head.

4. Hook the forked end of the Spoon under the head of the Striker protruding from the top of the Fuze Head.

5. Insert Safety Pin Assembly through the Safety Pin Hole. Bend the protruding end of the Safety Pin for retention. This will lock the Spoon with the Fuze Head. The Fuze Assembly is now set for firing.

6. Place a single Cap onto the anvil of the Firecracker Holder. Press the cap firmly so it won’t fall off.

7. Insert Firecracker into bottom of Firecracker Holder with the fuse facing up as shown. This is the completed Charge Assembly.

8. Insert completed charge by threading the assembly into the bottom of the Fuze Head. All components are right-hand threaded.

9. Thread the body into the Fuze Assembly you’ve just completed. ALL THREADS ARE RIGHT HAND THREADED.