S410 gub screw purpose?
Printed From: Kiwi Airgunners
Category: Technical
Forum Name: Pauly's Technical Area
Forum Description: Technical information, Modifications and DIY projects are all in here
URL: www.kiwiairgunners.co.nz/forum_posts.asp?TID=1173
Printed Date: 20 Apr 2025 at 12:00am
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Topic: S410 gub screw purpose?
Posted By: KiwiTR6
Subject: S410 gub screw purpose?
Date 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.  ------------- FX King 600 .22 FX Dreamline Classic .22 Diana Outlaw .22 Air Arms S410 .22 Cometa Fenix 400 .177 Weihrauch HW50 .177 Crosman 2240 Custom .22 Crosman 2250 Custom .22 Brocock Grand Prix .22 |
Replies:
Posted By: Myson
Date 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?  ------------- https://www.youtube.com/watch?v=eq7jVyBfFqE" rel="nofollow - https://www.youtube.com/watch?v=eq7jVyBfFqE Air Arms S510 US .22 Air Arms S410 .22 Weihrauch HW97KT .177 Weihrauch HW95 .177 |
Posted By: Pauly5
Date Posted: 21 Feb 2025 at 6:27pm
| 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. |
Posted By: KiwiTR6
Date 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. ------------- FX King 600 .22 FX Dreamline Classic .22 Diana Outlaw .22 Air Arms S410 .22 Cometa Fenix 400 .177 Weihrauch HW50 .177 Crosman 2240 Custom .22 Crosman 2250 Custom .22 Brocock Grand Prix .22 |