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Knight of Hate Saturday, June 10th, 2006
Period of
Product Use:
1 year16 of 18 people found this review helpful.

More than 5 years
Products Used:
A-5 Flatline: More compact and less expensive than the 98 Flatline for A-5, but less range and accuracy (see review body for explanation)
Marker Setup: Tippmann A-5 with the following modifications/upgrades: 32 Degrees Macroline Kit With Elbow & Straight Fitting, Bushnell Banner 1-4 x 32mm Riflescope, EastGate Design Hopper Adapter, Opsgear Barrett Style GAS THRU Tippmann A5 Sniper MAG, Palmer's Pursuit Shop Stabilizer, Proteam Products Solid F/X Sniper Stock, Ricochet R5 Hopper, Tippmann A5 EGrip, Underground Mod Shop 98C Flatline for A5, Underground Mod Shop Striker Rail, Unknown Brand Coiled Remote, G&P Jungle Series for RAS QD M203 Grenade Launcher Short, Pure Enegry 12oz CO2 Tank, RAP4 M203 Thunder Grenade.
Strengths: Looks, accuracy, range, optional rails for accessories
Weaknesses: More expensive and bulkier than A-5 Flatline, shoots well only with quality paint
Review: Back when I bought this barrel, it was still being offered by UMS as a custom order only. I had to supply my own A-5 Flatline and 98 Flatline, plus about $120 for parts and labor. I shipped the barrels to UMS, and about two months later I recieved my barrel.

During the ordering proces, I decided to add two 6" rails to the side and one full-length rail on the bottom, plus a special hole pattern that I designed. I included a diagram of the hole placement along with the barrels that I shipped to UMS. The finished product matched the diagram exactly.

Attaching this barrel is exactly the same as attaching a standard A-5 Flatline barrel. In fact, the only difference dimensions-wise between the two barrels is overall length.

While I couldn't do any side-by-side comparisons between my old Flatline and the new one, I could definitely see a noticeable increase in accuracy. Everyone who has tried shooting my A-5 has agreed that the accuracy is incredible, especially for a Flatline. While I probably wouldn't argue with someone that says a high-priced straight barrel could outperform it, the bottom lline is with this barrel you can hit what you aim at. UMS also claims that range is increased. I couldn't validate that, but I wouldn't doubt that the increased range is a factor in the improved accuracy. I used Black Ops paint for all of my testing and play-time with this barrel.

The only trouble I had with this barrel was when I first took it out to shoot it. My shots were hitting far lower on the target than they used to with my A-5 Flatline. This turned out to be a problem with my velocity; it was at around 300 fps. Setting the velocity down to 280 fps, the paint went where it was supposed to, and the accuracy increased as well. Generally, it is reccommended to set your marker to around 280 fps if yor using a Flatline anyway; this one is no exception to that rule.

Currently, ordering this barrel from UMS is a much easier process. You no longer have to supply your own barrels, and overall, the cost is about half of what I paid. Check with UMS for the availability of custom requests, such as specific hole patterns on the shroud.
Conclusion: A huge improvement over the A-5 Flatline. While not for every A-5 owner, for those who want increased range over straight barrels and don't mind the extra size and weight, this is the barrel to get.
9 out of 10

Review Comments
Tippy King Friday, May 4th, 2007 | 12:25 pm PST
I gotta say you gotta wicked gun! looks like it weighs a ton though.

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