Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Are these magazines compatible with the Umarex TAC?
Document: I was looking for extra magazines for my Umarex  S&W M&P. These filled the bill and work perfectly. Now I can shoot more and re-load magazines less often.
These mags are exactly the same as the original mag that comes with the S&W M&P air gun. I searched for them on the manufacturer's (Umarex) website where they sell other items direct and was unable to find them. Imagine my surprise when Amazon had them. Amazon has EVERYTHING. I'd purchased the gun from another online sportsman retailer, but they did not offer the replacement magazines either. These are the perfect accessories for the gun and makes plinking and target practice so much more enjoyable.
I bought these for my Umarex XBG pistol. They are very high quality, haven't had a problem with them at all. Very handy for anyone who like to be able to drop a mag, and just put in a new one.
The extra mags are a handy accessory to have. They are made by Umarex [see my reviews for various Umarex airguns, et al] and, a real plus IMO, they are made of metal, and not plastic as some others are. And hey, remember the classic [but still quite valid!]
Delivery = On time.Product = Exactly as explained, these are for 177 BB size in case you get confused like i did, they work for many types that are clip/mag feed style. I bought them for use in my Umarex Mp7 look alike that allows for a remove able BB pistol inside it, i also got one for my MP BB pistol that is made by a different company and both work fine.5 out of 5. I recommend this product to anyone needing extra mags or replacements.
If you buy any CO2 BB pistol acceptiing these magazines, by all means buy them as part of the kit.
I was blown away with the quality of these magazines, makes my practice easier and more fun. I like the way they work easily.
Very pleased with the weight of these magazines as they fall from the grip just like a real handgun. The construction seems to be of high quality and should hold up to hard use.
Magazines fit the crosman c31 perfectly. They fit tight and do not fall out as has been reported in reviews of crosman aftermarket mags. Strongly recommend.
I was surprised and pleased by the quality of the magazines. I have used them several times without any malfunctions whatsoever! Well made all metal no cheap plastic!! !
Answer: yes