Mark Camoc­cio tests a com­pe­ti­tion stock to fit his Air Arms S410

Air Gunner - - Contents -

Mark Camoc­cio tests a com­pe­ti­tion stock from Aeron on his Air Arms S410

Ive been in­volved in air­gun com­pe­ti­tion shoot­ing for many years now, and a big at­trac­tion for me and many fel­low en­thu­si­asts, is the ex­per­i­men­tal side, as we strive to ex­tract max­i­mum per­for­mance from our equip­ment. Of course, if you want suc­cess in FT or the in­creas­ingly pop­u­lar dis­ci­pline of hunter field tar­get shoot­ing, then the start­ing point is a pin- ac­cu­rate ri­fle ca­pa­ble of in­cred­i­bly tight group­ings down­range. Once you’ve es­tab­lished that a par­tic­u­lar gun is up to the job, though, it then comes down to just how well you can steer and con­trol this match- grade ma­chine, in the heat of com­pe­ti­tion, when the pres­sure is re­ally on.


Cus­tomi­sa­tion of the kit is ex­tremely pop­u­lar, as a wealth of keen com­peti­tors try their best to adapt and im­prove, to make their ri­fle and stock fit them bet­ter, and min­imise strain along the way, but whilst home DIY mod­i­fi­ca­tion has its place, and of course, can ben­e­fit shoot­ers on a bud­get, many shoot­ers are pre­pared to in­vest in their favourite sport, in a bid to im­prove their scores.

Sure Shot Air­guns have iden­ti­fied this need in the mar­ket, and they now im­port some im­pres­sive cus­tom stocks, made to fit some of the lead­ing brands of air­gun avail­able. The ACZ Ul­tra stocks are man­u­fac­tured by Aeron, a com­pany in the Czech Repub­lic, and are de­signed to be fully ad­justable so that the shooter can subtly al­ter all the key el­e­ments, to cus­tom fit his or her body di­men­sions.

Th­ese stocks are very sim­ple to fit, and are a great way to up­grade your ex­ist­ing ri­fle, just to al­ter han­dling and fit, whilst keep­ing all the tech­ni­cal per­for­mance of the ac­tion that al­ready works well. For ex­am­ple, the stock de­signed for the Air Arms S400/ S500 Se­ries of mod­els is very easy to fit, by re­mov­ing the sin­gle, chunky stock bolt and then drop­ping the ac­tion straight into the ACZ stock. If there is snug­ness around the gauge area – some­times th­ese can be fit­ted a bit off to one side – then the chas­sis can be quickly undone to make the gap larger; most should drop straight in, though. The de­sign sees the ac­tion only held tight along the length of the breech block, with the rest of the cylin­der un­sup­ported and al­lowed to flex freely, just as it should be.


Con­structed from high- strength Du­ra­lu­min AW7070, and fin­ished in a hard, black an­odized coat­ing to a thick­ness of 50 mi­crons, there is un­der­stand­ably a very durable feel to the ACZ de­sign. In ad­di­tion, the three wooden el­e­ments – the cheek piece, pis­tol grip, and palm rest – can be spec­i­fied ei­ther in black lac­quer, or a lam­i­nate wood fin­ish, and I can cer­tainly vouch for the pleas­ant grippy feel to the black lac­quer on test. At 4.6lbs, th­ese stocks are heav­ier than the stan­dard wooden item be­ing re­placed, but to many, that is a bonus for sta­bil­ity and a change in weight dis­tri­bu­tion.


Once in place, ad­just­ing th­ese stocks should be done in a care­ful mea­sured way, piece by piece, and over sev­eral ses­sions, rather than rushed in any way. Whilst ear­lier ver­sions had a far sim­pler ‘ham­ster’ sec­tion, this lat­est de­sign now gets

the fully ad­justable ham­ster as stan­dard, which can be al­tered for height, po­si­tion and an­gles, all at the tweak of a se­ries of Allen bolts. There’s the run of the ac­ces­sory rail to play with too, so it’s noth­ing if not ver­sa­tile. The po­si­tion of the pis­tol grip can be changed, by un­screw­ing the bot­tom bolt, and re­set­ting the grip into one of four pre- drilled mount­ing holes, ef­fec­tively al­ter­ing length of pull. Else­where, the cheek piece po­si­tion/height, and an­gle and height of the butt hook, are all eas­ily ad­justed, again by slack­en­ing Allen bolts, mak­ing the ad­just­ments as nec­es­sary, then re- tight­en­ing when all falls nat­u­rally into place.

Var­i­ous op­tional ex­tras are avail­able, such as a coun­ter­weight bar with weights, for ex­am­ple, andthis sim­ply screws into the butt hook assem­bly, us­ing any of the predrilled holes, then weights can be added or re­moved to suit.

At the end of the day, it’s all about set­ting up the stock to fit the in­di­vid­ual, so that a con­sis­tent, eas­ily at­tain­able, and re­peat­able sight pic­ture and mount­ing po­si­tion can be adopted, with min­i­mal mus­cle strain along the way – and with that goal in mind, th­ese ACZ Ul­tra stocks have to be seen as a big ad­van­tage, for any se­ri­ous en­thu­si­ast.

ABOVE: Trans­form your ri­fle’s han­dling with the ACZ Ul­tra stock

LEFT: An­gle the butt if you like

BELOW: The ACZ Ul­tra stock from Aeron

Note the length can be ad­justed

This shows the rear sec­tion that sup­ports the ac­tion

This shows the cheek piece ad­juster

Fit­ting is sim­ple with just the one stock bolt for S400/ S500 mod­els

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