The CZ-550 is a bolt-action hunting rifle series manufactured by Česká zbrojovka Uherský Brod (CZ UB).

The operating mechanism of the CZ 550 series is based on the Mauser M 98 controlled-feed bolt action system.

Another distinctive feature of the CZ 550 system is the controlled-feed mechanism, consisting of a large, non-rotating claw extractor that engages the cartridge case rim as soon as the round leaves the magazine and firmly holds the cartridge case until the round is ejected by the ejector, mounted inside the receiver.

A small disassembly button offers the possibility to access the firing pin and spring.

The action features a large gas relief hole at the bolt body designed to protect the user's head in case of a primer or cartridge rupture or detonation.

When the action suffers a catastrophic failure it is designed to deflect the debris away from the operator's face.

The user interface consists of a rather compact grooved button that should ensure good operability of the safety with low mounted aiming optics.

, with a two-position safety, adjustable set trigger, open sights, ventilated rubber butt plate, and 1 inch sling swivels.

Scandinavia The same rifle as the Standard version, with the addition of a Monte Carlo type walnut stock with a raised comb provided with checkerings and a rubber decelerator buttplate.

A heavy hammer forged barrel together with the shape of stock predisposes this rifle for shooting with optical aiming devices only.

Varmint-Laminated The same rifle as the Varmint model with a more weather resistant laminated wooden stock with reduced drop at the heel, Monte Carlo style cheekpiece and with a strengthened fore-end.

The rifle has a synthetic thumb hole stock that is adjustable for comb height as well as length of pull.

The underside of the fore-end is fitted with a 220 mm long rail that provides an attachment point for a bipod.

The CZ 750 SNIPER also features a muzzle brake, thread protector, mirage band and two 10-round detachable magazines.

The magnum-sized action is a magnum variant of the CZ 550 intended for big-game and safari hunting.

[3] Standard This rifle is the basic magnum size version fitted with walnut wood stock without cheekpiece, furnished with checkering and ventilated rubber buttplate.

The SAFARI MAGNUM special features include express sights (1 standing, 2 folding), hammer forged barrel and single set trigger.

The stock is made from select walnut wood and has a classic safari shape with rubber Pachmayr butt plate to reduced felt recoil.

model is a CZ USA model intended for long range shooting with a Bell & Carlson tactical Kevlar reinforced stock with a full length aluminum bedding block, a bull barrel, and a SureFire muzzle brake.

CZ USA offers with this series semi custom and custom-built rifles intended for big-game and safari hunting.

The rifles chambered in .505 Gibbs and .500 Jeffery include a mercury recoil reducer installed in the stock.

An American Safari Magnum in .458 Lott was found to have a pre-drilled cylindrical opening (empty in this case) in its walnut stock when the recoil pad was removed for measurement.

Since these rifles offer many options and can be built to individual customer specifications the weights and overall and barrel lengths vary.