UmarexHK Heckler & Koch VP9 Blowback .177 Caliber BB Gun Air Pistol, Spare 18-Shot Magazine (Mag Only), Black

If you have the gun, you know what to expect. If you're looking to possibly order an extra with the gun, do it. It's all around nicely made. Well worth it. Order 3

The product itself seemed to be fine but completely BLEW APART while it was in my pocket! And I mean LITERALLY blew itself to pieces and scared the crap out of me in the process....It's decently priced and worked without issues until I added only the second CO2 Cartridge. With this style of magazine, the CO2 is housed within the magazine itself vs the BB gun. It requires the use of an Allen Wrench to loosen and tighten a bolt at the bottom of the magazine. I have another BB PISTOL with a similar mechanism for the CO2 Cartridge but within the gun itself and I haven't had any issues after over 6 months of continuous use, changing the cartridge every 2-3 days.It's also important that I state clearly, I'm sure over-tightening the bolt could cause issues, however I know for a fact I didn't do that. I always read every line of warnings & directions prior-to use; when tightening a new CO2 Cartridge, as soon as I get the puff of CO2 and the new cartridge is snug, I immediately STOP tightening. Which is why I'm confident I must have received a defective unit - I go through the same process with the original clip/magazine that came with the gun itself and haven't had any issues at all....________________________________________________________________________________________________________I'm hoping that by writing this review the seller will contact me and sort this out; all I want is a replacement magazine free of charge and free of shipping costs based on receiving a defective unit, since my original magazine that came with my BB PISTOL is still 100% functional without any issues whatsoever, and I've replaced the CO2 cartridges in that original magazine over 40 times during the last 3 months without ANY issues.________________________________________________________________________________________________________Aside from this, for anyone looking to purchase this style of magazine, I'll mention a few things:- This is for a blowback pistol. As such, you're going to get a slightly lower FPS for the BB'S since a portion of the gas being released is used to push back the slide in addition-to propelling the BB's- The more you shoot, the more the FPS will taper down until you start to get misfires & failed slide blowbacks...- In my experience with this blowback pistol (with the CO2 housed within the magazine), I've repeatedly & consistently gotten 2-3 full clips of BB'S before the gun will fail to fully blowback, &/or misfire where a BB will not be discharged.- In one of my other Blowback BB guns (Colt M45 Government Model // 0.45 Black & Beige Blowback, specifically the "Colt 2254045 M45 CQBP - DEB - Metal Slide Air Pistol .177 BB"), with the CO2 housed within the pistol and a stick magazine, I get 4 full magazines, (rare occasions even 5) before experiencing those jams or failed slide blowbacks. -----> IMPORTANT <----- || -----> IMPORTANT <----- || -----> IMPORTANT <-----**** If the seller is able to replace my faulty unit, once a receive the new one, I'll put it through the motions for about a week, and then amend my review accordingly; I'll update the the Stars, Headline, and written Review based on the new experience. *****

I have purchased 2 of these magazines and each one the seals fail within 6 months. Own an original VP9 and was using this for practice. Not cost effective.