This mod is aimed towards the reinforced gearbox shell design and not the standard gearbox shell. A problem that I have found with these reinforced gearbox designs is that if you switch gear sets sometimes the gears won’t fit. Lucky for me it was the spur gear that didn’t fit right. The top teeth of the spur gear was coming in contact with the shell itself so I had to grind down the shell to make it fit. As far as I know this does not affect the structural integrity or performance of the gearbox itself so relax. The gearbox shell fit together fine also and the spur gear is now able to spin freely. This is a G&P gearbox shell with 8mm bearings. The gear set I’m installing is a Matrix 13:1 gear set. I used an angle grinder to get the job done as a dremel would take way too long. Hopefully this video will give you a solution to some problems that you might encounter when you install a new gear set. Be careful with power tools and remember to wear a respirator, eye protection, and ear protection when doing this. Thanks for watching and if you liked the video please “like” the video. Thanks.

how to make a sling-shot / bb-gun …..

Share on FB: on.fb.me Click to tweet! clicktotweet.com Guys, realistic airsoft guns are about to be banned in CA. Learn more here: on.fb.me This is why we installed such a complicated storage system :S