S20 mk3 barrel on a mk1?

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Pete2
Posts: 14
Joined: Sun Nov 11, 2018 9:15 pm

S20 mk3 barrel on a mk1?

Wed Dec 05, 2018 4:17 pm

Will a barrel from a mk3 s200 fit a mk1?

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Pete2
Posts: 14
Joined: Sun Nov 11, 2018 9:15 pm

Re: S20 mk3 barrel on a mk1?

Sat Dec 22, 2018 7:26 am

Yes, straight swap. How do I know?
Because I purchased one (mk3 barrel) to fit my mk1.
Only difference is the muzzle end is not turned down so the mk1 slip on silencer / moderator will not fit the new barrel.

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TenMetrePeter
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Joined: Wed Jun 29, 2016 5:40 pm
Location: Luton Beds UK

Re: S20 mk3 barrel on a mk1?

Sat Dec 22, 2018 10:09 am

Thanks for that. Sorry nobody could help you before, but hopefully you will have helped others which is what this forum is all about :)
S400 MPR Precision 10m with TMP alloy stock.

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Y-Geo
Posts: 17
Joined: Fri Dec 28, 2018 12:15 am

Re: S20 mk3 barrel on a mk1?

Sun Dec 30, 2018 4:52 pm

Hi,
If you decide to go with the new Mk3 barrel it might be wiser to go with a screw on Moderator mod using a 1/2" unf thread on the muzzle

BUT be aware that NOT all the bores are actually concentric with the outside diameter of the barrel so that the thread under those circumastances would put the moderrator off line with the pellet flight from the muzzle! !!!

Just make sure the machinist takes the centre of the actual bore and trues the barrel outer diameter to make it concentric then machines the threading.!

Do NOT ask how I know this ! :oops: :evil:
S & F
Y-Geo.

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Pete2
Posts: 14
Joined: Sun Nov 11, 2018 9:15 pm

Re: S20 mk3 barrel on a mk1?

Mon Dec 31, 2018 10:10 pm

Thanks guys. I have briefly used a slip on adapter with 2 grub screws to hold it in place.
The grub screws can work loose which I assume results in the moderator going slightly off line and affecting the consistency.
Last couple of days I've been to the range early morning and pellet testing with the mod off.
Long story but I fitted a reg and have been messing about trying to get it set up correctly.

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Y-Geo
Posts: 17
Joined: Fri Dec 28, 2018 12:15 am

Re: S20 mk3 barrel on a mk1?

Tue Jan 01, 2019 2:48 pm

Pete2,
ball park figures for setting the reg :-
.177 = 100 -110bar
.22 = 110 -120bar

S200 reg testers are available pretty cheap from Robert Lane designs on Ebay or direct from Robert himself
S & F
Y-Geo.

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