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Airsoft Hardware => Gas Powered Guns => Topic started by: Roland1014 on September 15, 2013, 09:08:34 PM

Title: Project 5-7: CNC Hop Up unit for the Tokyo Marui FN Five-seveN
Post by: Roland1014 on September 15, 2013, 09:08:34 PM
I'm working on a project to have CNC hop ups made for TM 5-7s to alleviate the issues created by running propane and green gas. Head over to ASF to learn more:

http://www.airsoftforum.com/board/Fixing-5-7-CNC-Hop-Cha-t275539.html&pid=18739852#entry18739852

If anyone is interested, please let me know. If anyone has access to a CNC machine that can mill 303 stainless pm me.
Title: Re: Project 5-7: CNC Hop Up unit for the Tokyo Marui FN Five-seveN
Post by: Warlord on September 16, 2013, 02:42:51 PM
Good job, if I had a Five-seveN I would definitely support you. But I agree that this should come first before temporary sealant, glue, and tape fixes.
Title: Re: Project 5-7: CNC Hop Up unit for the Tokyo Marui FN Five-seveN
Post by: XavierMace on September 16, 2013, 04:40:00 PM
Interesting work to be sure, but IMO, the slide is the much larger issue.
Title: Re: Project 5-7: CNC Hop Up unit for the Tokyo Marui FN Five-seveN
Post by: Roland1014 on September 16, 2013, 05:44:57 PM
Quote from: XavierMace on September 16, 2013, 04:40:00 PM
Interesting work to be sure, but IMO, the slide is the much larger issue.

The outer slide? Creation has an aluminum inner slide that should alleviate forces from the recoil. If it turns out otherwise, then that will be something to look into after the hop up is produced.
Title: Re: Project 5-7: CNC Hop Up unit for the Tokyo Marui FN Five-seveN
Post by: nukeduster on September 17, 2013, 12:12:16 AM
7075 T6 is probably a better alloy to use than 303SS. Its cheaper to machine and has a better strength-to-weight ratio while at the same time almost having the same tensile strength.
Title: Re: Project 5-7: CNC Hop Up unit for the Tokyo Marui FN Five-seveN
Post by: Roland1014 on September 17, 2013, 06:46:21 AM
Quote from: nukeduster on September 17, 2013, 12:12:16 AM
7075 T6 is probably a better alloy to use than 303SS. Its cheaper to machine and has a better strength-to-weight ratio while at the same time almost having the same tensile strength.

Alright. Do you think it will stand up to the abuse of a steel barrel?

Edit: 7075 does sound like the better option now. Looks like it has a better tensile strength to weight ratio. Thank you for the input.