BUMP45 - Realistic Toy Blaster

A UMP45 inspired bolt-action toy blaster with realistic shell ejection, printed ammo and decent power!
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updated September 16, 2024

Description

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THE BUMP45 - Realistic Toy Blaster

This is a toy that fires a projectile! Never brandish this as a real weapon or bring it out in public, this is a toy modeled off of a REAL LIFE firearm, treat it as such. Just because you know it's a toy, doesn't mean other people will. Enjoy, be safe, and be smart!

(I am waiting on some hardware so I can upload a build video, but everything seems to work well with my tests. I will upload a build guide, STL's and more info once the parts arrive but for now I have just included the .Step files.)

My most impressive blaster/launcher yet, now featuring realistic shell ejection and medium launching power! Perfect for shooting cans or targets and amazing your friends with the realistic action. Based on the H&K UMP45, I tried to keep the look as accurate as possible, but for simplicities sake I omitted a couple features.

BUILD VIDEO: 

Ejection Video: 

Printed Parts & Recommended Settings

Core Parts:Walls/Top/Bottom:Infill:Supports:Brim?:
Lower Frame3+15%+Yes - OrganicYes
Upper Frame3+15%+Yes - OrganicYes
Barrel Cover3+15%+Yes - OrganicNo
Rear Cover3+15%+NoNo
Barrel3+15%+NoYes
Muzzle3+15%+NoNo
Trigger3+15%+NoNo
Striker Latch3+15%+NoNo
Magazine Latch3+15%+NoNo
Bolt4+15%+Yes - StandardNo
Striker4+15%+Yes - StandardNo
Charging Handle4+15%+Yes - StandardNo
Magazine & Ammo:    
Magazine3+15%+Yes - StandardNo
Lift Table3+15%+NoNo
Spring Base3+15%+NoNo
Magazine Base Plate3+15%+NoNo
Magazine Spring (Experimental)3+15%+NoNo
Bullet3+15%+NoYes
Casing3+15%+NoNo
Accessories:    
Foregrip4+15%+Yes - NormalNo
Sight3+15%+Yes - OrganicNo
Reticle3+15%+Yes - OrganicNo

Hardware:

M3 Nuts & Bolts
Length (mm):Number Needed:
84
122
164
181
254
M3 Hex Nut15
Metal Dowels: (Steel or Brass)
Diameter (mm):Length (mm):Number Needed:
2222

Compression Springs:

Wire Diameter (mm):Outer Diameter (mm):Length (mm):Purpose:
0.81090 - 100Striker Spring
0.610150 - 160Bolt Spring
0.610130-140Magazine
0.4-0.53-515 - 20Magazine Catch
0.4-0.53-510 - 15Striker Latch

Internal Parts:

Bolts & Adhesive:

Springs:

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Model origin

The author marked this model as their own original creation.

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