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Im about to purchase a S1 shotgun, probably a Hatsan MPA or similar.
Are there any adjustable stocks to fit these style of semi autos?
I want to keep the pistol grip but need the stock to be adjustable such as like on an AR.

Not for an MPA as far as i'm aware. I would also strongly advise against buying an MPA if you're going to be using it for practical or target* shotgun as they are not suitable firearms for those purposes.

*NTSA not NRA 'target shotgun'

You really need to get a gun that can either take an AR style buffer tube or find one that has a propriety length of pull adjustment method (many semi-autos have spacer blocks in front of the recoil pad that can be added to the stock to increase its length).

Other than the box magazine shotguns I can't actually think of a semi-auto that will take an AR buffer. Loads available for pump actions though.

You should be aware that the gun must comply with 40" overall length requirement as well, and that is with the stock in the fully collapsed position, or if you can remove it with out tools, with the stock off

Gazza, if you're going to use a section one shotgun for wing shooting of pigeons; as per your grant justification, then a pistol grip and collapseable stock is far from ideal. You need a consistant mount with a good cheek weld from a gun that fits. Why not a conventional stock? If you need a shorter stock then youth model butts are often available.

TomH wrote:Gazza, if you're going to use a section one shotgun for wing shooting of pigeons; as per your grant justification, then a pistol grip and collapseable stock is far from ideal. You need a consistant mount with a good cheek weld from a gun that fits. Why not a conventional stock? If you need a shorter stock then youth model butts are often available.

The reason I want a pistol grip and adjustable stock is due to Arthritis.
I'm changing/changed all my guns to pistol grip guns due to comfort as the movement of my wrists these days necessitates this.
When I got my AR15 I realised this was the way to go for everything from now on.
I can get a perfect fit with an adjustable stock and pistol grip and can quickly mount the AR much faster than my clay gun.
Let me say I'm no George Digweed and never will be I just want comfort for my hobby

Ah yes, now I see. Still think you'd be better off with a solid stock though rather than a Lego one. There's balance of the gun to consider as well.

TomH wrote:Ah yes, now I see. Still think you'd be better off with a solid stock though rather than a Lego one. There's balance of the gun to consider as well.

Balance of the gun is an issue I must admit I have thought long and hard about it and still thinking :)

Gazza wrote:

TomH wrote:Ah yes, now I see. Still think you'd be better off with a solid stock though rather than a Lego one. There's balance of the gun to consider as well.

Balance of the gun is an issue I must admit I have thought long and hard about it and still thinking :)

Can always weight the stock maybe ?

Yes Dell, that's a possibility. I think once Ive sorted a gun I can balance it to a degree with lead.