S410 gub screw purpose?

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   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 - Yesterday at 3:08pm

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
KiwiTR6 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 04 Nov 2022 Location: Stratford Status: Online Posts: 315	Post Options Post Reply Quote KiwiTR6 Report Post Thanks(0) Quote Reply Topic: S410 gub screw purpose? Posted: Yesterday at 3:07pm
	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 - Yesterday at 3:08pm
	FX Dreamline Classic .22 Diana Outlaw .22 Air Arms S410 Classic .22 Cometa Fenix 400 .177 Weihrauch HW50 .177 Crosman 2240 PCP Custom .22 Crosman 2250 PCP Custom .22 Brocock Grand Prix .22

Myson Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 07 Mar 2016 Location: Feilding Status: Offline Posts: 185	Post Options Post Reply Quote Myson Report Post Thanks(0) Quote Reply Posted: Yesterday at 3:53pm
	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 Air Arms S510 US .22 Air Arms S410 .22 Weihrauch HW97KT .177 Weihrauch HW95 .177

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1489	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 22 hours 33 minutes ago 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.

KiwiTR6 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 04 Nov 2022 Location: Stratford Status: Online Posts: 315	Post Options Post Reply Quote KiwiTR6 Report Post Thanks(0) Quote Reply Posted: 21 hours 39 minutes ago at 7:21pm
	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 Dreamline Classic .22 Diana Outlaw .22 Air Arms S410 Classic .22 Cometa Fenix 400 .177 Weihrauch HW50 .177 Crosman 2240 PCP Custom .22 Crosman 2250 PCP Custom .22 Brocock Grand Prix .22