X-Five .177 Caliber

Pretty good gun after slight alteration. It kept jamming after just a few shots then I looked closely at the clips and they are made with a slight flaw so I took some professional finger nail trimmers and shipped off a bit of the plastic on all the magazines and that fixed the issue.. great to shoot now. Altho sometimes a pellet still gets jammed but not nearly as often so I use bbs most of the time with no problems

Pros (and there are more than listed here): Realistic look and feel makes it a perfect training weapon. ADJUSTABLE REAR SITE!!!! Sig's lever gas cylinder loading system avoids the waste of screw-in types. 20 round belt-fed magazine separate from the version used in the M-17 model reduces CO2 waste. Longer barrel helps with tighter shot grouping. Functional slide adds to the look and feel (though wastes CO2 to accomplish that). Pic rail for lights and/or laser sites. Rifled 5" barrel for better accuracy. Ambidextrous safety (requires a bit of breaking in). Cons: Decorative hammer stays cocked until slide hasn't the gas to push it back (though it is a nice reminder that the weapon is loaded). Unlike other P320's, the slide cannot be removed, a serious drawback should a round jam. Cannot be disassembled for proper cleaning. For women, it can be uncomfortable to carry in a belt holster, I have to use a drop-leg (shoulder holsters are not practical for a weapon this large and heavy). Okay, those are the highlights. The longer barrel makes this one more accurate than my M17 version using the same style and weight pellets. Unless you want to destroy it, don't even think about using BB's. I get good half-dollar groupings at 20 meters using the iron sites (front fixed, rear adjustable for windage and elevation), which is good enough for me. As I'm both in a wheelchair and live in an area with a coyote issue, this gives me a way to convince the critters I'm not meals-on-wheels. It also works as a less-than-lethal tool for self defense, preferred to the alternative while living in an apartment with thin walls. I have found Premier Destroyer pellets 7.4 gr work best for me, lighter ones cause wider shot groupings, heavier ones reduce effective range. The pellet design gives me the penetration of target I need to avoid being a snack. THIS IS NOT A TOY. It looks very real, especially to cops, so don't "play with it" or allow minors to operate without continuous supervision. As pellets can do odd things for all sorts of reasons, always wear eye protection. Always handle as though the real deal that is loaded and the safety is off. Invest in a trigger lock to eliminate all sorts of potential regrets. I use a lock-box as well, since I already had it. Keep it properly maintained (insofar as the inability to disassemble allows) to avoid damaging the weapon or causing injury. Be sure to remove CO2 cartridge before attempting to clear any jam, and when clearing it use only a .177 (4.5 mm) cleaning rod.

I wanted to like this pistol. It looks great and has significant heft. But 1/2 way through the first CO2 cartridge the thing jammed. It wouldn't fire, wouldn't advance to the next pellet, and the magazine wouldn't come out. There's no Sig Sauer sanctioned way for the owner to fix it. The user manual says that if there's a jam, you have to send it back to them for repair. What??? At this point I wanted to just return the thing as it was brand new, but doing so through Amazon was very difficult. The item cannot be returned! Amazon eventually took care of me, but for a while it looked like I was going to be stuck with a $100+ paperweight. Jams in Sig Sauer air pistols are a known and pervasive issue. I should have done my homework before buying. My advice is to try a different pistol from a different maker, or buy this model from a store that allows returns. Sig is trying to get into the serious airgun world, but this entry is a failure. Too bad, as they make excellent firearms and have the potential to make quality airguns.

I have fired two full tins of 500 = 1000 pellets through this gun with zero jams. That's pretty darn good. But I did stick to using Sig Sauer flat nosed wad cutter pellets since all pellet pistols are picky. The blow back is small and only serves to cock the hammer. The 1st action of the trigger pull places the pellet in battery. (you can feel it in the trigger). The trigger pull is fine. I was able to obtain groups of about an inch at 7 yards. At about the four and a half magazine point the trajectory of the pellets started falling of and shortly there after the blow back was insufficient to cock the hammer. So I change out the cylinder, with some lube on the business end, now after four magazines have been shot, Very, very satisfied with this pistol for practice in the garage. I would definitely buy a Sig Sauer again. If things change I'll come back and up date. UPDATE March 13 2024: Have now put a total of 1500+ through it with no jams. I don't know what others are doing wrong. Use Sig pellets, they're cheap and make sure they're seated and pull the mag rail around a little before shooting. UPDATE March 28 2024: I have now put a total of 5 tins of 500 pellets through this pistol...2500+ with zero jams or problems of any kind (yep, been̈ doing a lot of practice/ shooting). More than happy with this pistol. Secret is to use Sig pellets.