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CHANGING OVER TO TARGET-STYLE APERTURE SIGHTS One topic that seems to occur quite often on the various discussion forums revolves around the question of whether it is feasible to easily and economically convert the CZ-452 variants to an aperture sighted configuration. These little gems have proven in everyday service to show an accuracy level far above what their typical cost would suggest. The basic premise behind this discussion is, of course, can they be turned into a "poor man's" target rifle for conventional Prone and 3-P competition. The answer is a resounding YES ! To date quite a bit of work has been done in adapting these fine little rifles to such usage by several enterprising owners and other members of the rimfire fraternity . . . (sorority also, if I'm not mistaken ). In almost every instance noted to date, the addition of a conventional rear aperture target sight, while in itself fairly straight-forward, introduces a further problem "up front". Because the aperture in these rear sights tends to be quite a bit higher than the notch centre in the regular open rear sight, this change does entail the use of a front sight much higher from bore centre than the existing ramp/blade arrangement if correct aiming/impact point alignment is to be maintained. How to take care of this problem ? A major stumbling block for many would-be competitors with little in their pockets to keep gunsmiths away from the poor-house ! In all cases discussed here, we assume that the owner already has, or can readily obtain a new or used target-style front globe sight . . . the best German-made new ones will typically cost one around $60. There is a relatively simple method that can be employed by most folk at minimal expense and a few minutes backyard workshop effort. 1. FRONT SIGHT MODIFICATIONS AND INSTALLATION With only a minor modification, a target
style front sight can be fitted to the existing ramp, yet still
allow the owner to re-install the standard blade should he so
desire. Remove the hood, loosen the blade locking
screw and slide out the front sight blade. If
you now look closely you will see two slots running fore and
aft along the sides of the foresight ramp. These
are positioned to pick up the lower edges of the standard front
sight hood when it is slid into place. Why a Vee ? Well, the majority of the existing target fromt sight assemblies are designed to fit over standard Vee blocks, or across Vee'd grooving machined directly into the end of a target rifle barrel. Trial and error assembly of your chosen front sight will determine just how much to open up the grooves. Be aware that not all existing globe sights can be fitted this way . . . with some variants there is insufficient clearance in the "clamp area" to clear the top of the existing ramp without further modification. Should this be the case then a decision must be made to remove material from the top of the ramp. The illustrations on this page show
the relatively simple modification to the existing front sight
ramp on any of the CZ-452 models with existing iron sights. How to do it ? Well, for those who are especially fussy, visit your local gunsmith and have him mill down the ramp. For the rest of us . . . you know the ones who like to tinker, and have no pennies to spare . . . a few minutes work with a sharp flat file will accomplish the same thing. The thing to watch in either method is not taking off any more than is absolutely necessary . . . just enough to allow the fitting to slide on . . . this will give the installed sight the maximum stability. In the case of some model sights the ramp may be somewhat narrow compared to the dovetail groove in its' base . . . use care in allowing the sight to self-centre as you install it, or use narrow shimstock in the dovetail groove on the side opposite the clamp block. Another approach is to use the front sight supplied by Air Arms/CZ on the new Avanti Valiant and on the Daisy 853, 753 and 888 sporter air rifles . . . no idea as to cost . . . but probably available from Champions Choice or Pilkington Guns. This sight uses a split two-piece clamp arrangement for attachment . . . gives a better hold. Get the metal version, NOT the plastic ones.     2. REAR SIGHT MODIFICATIONS AND INSTALLATION For those wishing to install aperture style rear sights on their CZ-452's there are any number of ways to handle this. In essence one can choose from three basic categories of target sights. The simpler, relatively inexpensive units manufactured by such American companies as Williams or Lyman, and the ex-air-rifle types from Daisy or Gamo. Going up a notch in quality ... and price ... one can still find samples of the excellent Redfield Olympic, International and Palma sights on the surplus market which will require the prior installation of an adapter bar on the side of the receiver. Finally., one comes to the exotic - and very expensive - rear sights made for todays' top match rifles by Anschutz, Walther, Steyr, etc, etc. Most of these latter sights will slide directly onto the 11mm dovetail to be found on the standard Open-sighted CZ variants. NOTE: The CZ American variants use a 3/8" dovetail and the European sights will NOT fit this ! In many cases some modification of either the sight, the adapter base or the receiver itself will be required to complete the installation. The degree of modification ... and the users ability to make it .... will greatly determine what type of sight is to be used ! Below are several pictures showing how the task has been handled by several owners over the past couple of years.               
     
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