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S410 gub screw purpose? |
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KiwiTR6 
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Joined: 04 Nov 2022 Location: Stratford Status: Offline Posts: 370 |
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 Topic: S410 gub screw purpose?Posted: 21 Feb 2025 at 3:07pm |
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Can anyone tell me what the purpose is of the 3mm grubscrew below the breach block on my recently acquired Air Arms S410 Classic? I noticed it was about to fall out but none of the parts diagrams or YouTube tear-down videos show it so I have no idea what it's purpose is. I assume it locks something but it travels a long way in and I don't want to risk tightening it and doing some damage.  Edited by KiwiTR6 - 21 Feb 2025 at 3:08pm |
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Daystate Red Wolf .22
FX Dreamline .22 Diana Outlaw .22 AA S410 .22 HW98 .177 HW50 .177 Diana 340 E-Tec .177 FWB Sport 124 .177 Fenix 300 .177 Baikal IJ-22 .177 Crosman 2240 Custom .22 Brocock GP .22 |
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Myson
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Joined: 07 Mar 2016 Location: Feilding Status: Offline Posts: 210 |
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Posted: 21 Feb 2025 at 3:53pm |
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Hi Gavin,
On my Side Lever version of the AA S410 Classic, that's where the high-low power button sits. Perhaps your button has been lost (?) and this grub screw controls the high-low power setting? On mine, turn the screw (button) anti-clockwise until it stops - that's High power (32ft/lbs). Turn it clockwise until it stops - that's Low power (sub-12 ft/lbs). Hope that helps?
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https://www.youtube.com/watch?v=eq7jVyBfFqE
Air Arms S510 US .22 Air Arms S410 .22 Weihrauch HW97KT .177 Weihrauch HW95 .177 |
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Pauly5
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Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1605 |
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Posted: 21 Feb 2025 at 6:27pm |
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Yea, I think Myson is correct, but probably not a lost knob, but an adjustable grub screw. I suspect it will be a cone shape and adjusting it will alter the transfer port size.
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KiwiTR6
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Joined: 04 Nov 2022 Location: Stratford Status: Offline Posts: 370 |
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Posted: 21 Feb 2025 at 7:21pm |
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Thanks guys, that makes sense as the screw end is tapered. I'll play around with the chrony to determine where I should set it at.
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Daystate Red Wolf .22
FX Dreamline .22 Diana Outlaw .22 AA S410 .22 HW98 .177 HW50 .177 Diana 340 E-Tec .177 FWB Sport 124 .177 Fenix 300 .177 Baikal IJ-22 .177 Crosman 2240 Custom .22 Brocock GP .22 |
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