Unveiled for the first time in May 2009, the selective-fire Scorpion EVO 3 A1 represented a true departure from normalcy for CZ. In fact, the new submachine gun outwardly showed no resemblance to either the XCZ 868 prototype or its first- and second-generation predecessors. First, the new arm makes extensive use of polymer. For example, the two-halved receiver, handguard, adjustable (for reach) pistol grip and removable, adjustable side-folding buttstock, as well as the magazine were all made from polymer. When combined, the fiber-reinforced polymer receiver and handguard provided 11 inches of continuous Picatinny rail to which optics can be attached, though adjustable, factory-mounted iron sights come standard. On each side of the handguard is an additional 3.75 inches of rail, and on the bottom there is another 5.5-inch strip—ample room to add myriad accessories, such as lights, lasers, etc.
Instead of the straight, metal stick-type magazine of the XCZ 868, the EVO 3 A1 uses a 30-round, dual-stack, forward-sweeping version made from translucent polymer. The earlier vz. 61 is fed from a curved magazine, too, though it holds fewer rounds. To increase the rapidity with which the magazine can be changed, the A1 has a prominently flared and tapered magazine well.
Unlike the first- and second-generation Skorpions, the EVO 3 A1 has a non-reciprocating charging handle that can be quickly and easily changed from the left side to the right to accommodate both right- and left-hand shooters. Once the charging handle is fully retracted, the tab can be pushed upward into a cutout in the top of the handguard that maintains an open-bolt position. In this situation, a charged magazine can be inserted for loading or, by withdrawing the single disassembly pin, the trigger unit and slide can be removed for cleaning and maintenance; no tools are necessary. With a fresh magazine in place, pushing (or smacking) downward on the charging handle permits the recoil spring to advance forward, where it will strip and chamber a cartridge. To increase purchase, the charging handle/tab is both contoured and features steps in lieu of ribs.
Scorpion EVO 3 A1’s fire controls are all found integral in the trigger unit, and with the exception of the steel slide-release lever, the components are all polymer. One of the few criticisms of the Scorpion EVO 3 design is this fire control. On the semi-automatic S1 version, when in the a “fire” position, the tab is rotated downward, effectively placing it against the base of the trigger finger of the shooting hand where, during firing, it will cause a blister and/or skin abrasion relatively quickly. This problem can be encountered on the A1 version, too. As such, lightweight gloves are recommended.
As for the single-stage trigger, due to its design the pull weight is exceptionally heavy and the travel long but smooth. This is likely not problematic when firing from a buttstock-equipped EVO 3 A1, but it’s altogether different when shooting it as a pistol. The substantial pull weight tends to lead to jerking the trigger, which typically drops shots low and right for right-handed shooters. Consistent breaks are achievable, but it takes considerable concentration to achieve them.
Fortunately, when the highly anticipated and civilian-legal EVO 3 S1 was unveiled at the 2015 SHOT Show, the pistol mimicked the appearance of a stockless A1; in fact, outwardly it seemed unchanged. Why? CZ only made those modifications to ensure NFA compliance. First, and most significant, the four-position selector switch is gone, since the gun can only fire in semi-automatic mode. In its place, the EVO 3 S1 has a standard, two-position safety. With the safety’s tab in the upward-most position, it’s in the “safe” mode, while rotating it downward readies the S1 to fire.
Next, due to its 7.72-inch barrel and 25.98-inch overall length, the S1 would be considered a short-barrel rifle (SBR) and subject to NFA regulations. Absent the side-folding buttstock, though, BATFE classifies the S1 as a “pistol.” Lastly, because the S1 is intended to be shot as a pistol, CZ prudently included a handstop on the handguard’s bottom accessory rail to prevent the user’s non-shooting hand from slipping forward and onto the compensator or in front of the muzzle. As mentioned, CZ only made those few changes that were required by law for civilian sales—the new pistol is otherwise just about identical to its selective-fire inspiration.
Despite its large size for a handgun, the Scorpion EVO 3 S1 is extraordinarily well balanced, enabling it to be shot one-handed without the use of supplemental support. In fact, it feels as though you’re holding a full-size Smith & Wesson M&P or Glock pistol—nothing more. That being said, for a nominal cost of $80, CZ offers an arm brace kit that permits users to add an aftermarket arm brace or other AR-15 pistol buffer-tube accessory. Made by KAK Industries, the flat-black-anodized 6061 T6 aluminum adaptor attaches directly to the receiver cover. In reality, though, shooting the EVO 3 S1 one-handed is primarily for “kicks,” as the test sample’s long, yet smooth, 9-pound, 11-ounce trigger pull precluded extracting maximum accuracy from the handgun. With practice, though, it’s likely that groups could be tightened a bit, but it’s improbable someone will ever match the accuracy garnered from two-handed shooting.
This could also be because the sights offer a lot of versatility. The adjustable-post front sight and rotating, four-size aperture rear sight facilitate precise shooting in a variety of lighting conditions and engagement ranges. When testing the EVO 3 S1 at 25 yards on a cloudless day, I found that the third-largest aperture (.150 inch) worked best. The largest aperture, with a .195-inch diameter, would excel in low-light and close-range confrontations, while the smallest, measuring only .053-inch wide, is suitable only for use at distance.
During testing, there were no failures of any type. The firearm fed, extracted and ejected without fail, regardless of the ammunition it was fed. Given its lineage, though, that’s to be expected. In fact, a hodgepodge of remnant 115-, 124- and 147-grain FMJ and self-defense loads were purposely loaded into a single magazine in random order, and the pistol handled everything without issue. One thing to take into consideration, though, is that the EVO 3 S1’s 7.72-inch barrel affords additional in-barrel time for the propellant to be consumed, so “subsonic” ammunition could turn supersonic. In general, there’s a noticeable uptick in velocity over what’s achievable in a standard-length pistol barrel.
CZ-USA’s own website—and having experienced it personally several times, it seems inevitable. Unlike some commenters, who offered that judicious application of a Dremel tool could remedy the problem, for recreational shooting I simply suggest wearing thin gloves. I purchased a pair of clearance golf gloves, which worked perfectly and helped minimize discomfort. Although the pistol grip has steps on both the frontstrap and the backstrap and is flared create purchase, the smooth sides could benefit from checkering or stippling.
Since U.S. citizens cannot own the full-automatic A1, the virtually identical, semi-automatic EVO 3 S1 pistol is the next-best thing. And, with a suggested retail price of $849, it’s a tremendous value, too.