"I have had my 5.1 for about eight months now and have used it exclusively on propane. It has been babied when at home, but not on the field and is my primary for indoor fields. It was also my first TM gun and boy, have I been impressed. Everything they say about TM pistols is true and proudly displayed in this pistol.
The build quality is excellent, and in fact the only issues Ive had have been with other company products used in conjunction with the pistol. There are no real seams anywhere on it, either slide or frame, its got a decent amount of heft to it with a loaded magazine but is light without it. Thankfully, the overly long orange tip came out of the barrel with little work, a short bath in hot water and it came out undamaged and I can replace it for travel with ease. The sear and hammer are well matched, not match precision of course but that isnt needed. The hammer is held back far enough that the slide and nozzle dont catch on it unlike WE models.
The recoil is light in comparison to my KJW P-08 and various metal slided pistols, but is also incredibly quick, making double taps very fast. The light weight also means that you can really get to blasting with it without too much drop off.
The hop up and inner barrel are of course, magic straight out of Dwarven legend.
The only downsides to the pistol are, for the most part, not its fault.
Firstly, the light rail isnt actually attached out of the box and requires you to drill the holes in the frame to attach. This was a little bit of a lip biter for my because, heck, who wants to possibly ruin a brand new pistol? Its straight forward enough however and isnt a problem.
Second, and the only other issue with the pistol, and this is purely personal taste, the rear sight has no dots, its just a straight bar with a slot in it. It is fully adjustable of course but I really would have liked a three dot arrangement or a Millet style white bar.
The only big issue with compatibility I ran into is the pistol does not get along with WE Hi-Capa magazines. They feed and fire just fine, but the follower doesnt ride high enough to engage the slide stop and, as I found it, was causing the catch to peen and round a bit. Ive found that KJW magazines work without flaw however which is great.
This last one really is not a con of the pistol, but I just flat out hate the blocky pistol grip it and most Hi-Capa clones come with. I replaced mine with a Tanio Koba grip set and havent looked back.
So, pros and cons.
Great, snappy recoil if light.
Wonderful, solid construction.
Very little play in the slide.
Classic TM accuracy.
Fit and finish is superb.
Slide release that actually works when you rack the slide! How novel.
Gas efficient, doesnt much care about temperature even down into the mid 30's.
Blocky grip frame(?).
Light rail requires drilling frame to install.
Doesnt like WE magazines.
Overall, a great pistol, theres no shortage of upgrade parts for the Hi-Capa and the TM 5.1 makes a great start to your perfect pistol or a great out of the box performer.
"I was recommended this brand of GBB pistols, and I'm glad I bought this GBB this is my second purchase I have an AEG and my now my TM hi capa 5.1. My TM can compete with my $300 G&G. This is the best purchase I made.
Pros: Everything the only con I noticed is the plastic side and It doesn't bother me at all It does increase the ROF and that is a plus for me.
"Great pistol! Bought about 2 weeks ago and I'm very happy with its performance. Very accurate and gas efficient. I get 3 full mags of bbs off 1 fill of gg on the tm mag and 2 full mags off bs with the we mags. Some upgrades I would suggest are bucking, inner barrel, lightweight bbu, and a metal slide.
Plastic but I don't mind because it keeps the weight down and shoots fast