Frag Out! Magazine

Frag Out! Magazine #32

Frag Out! Magazine

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to disassemble the gun. There are multiple confirmed stories of lost gas regulators and some of users even secured them permanently. Regulator should be re- designed with some kind of locking mechanism or its position should be only adjustable with the tool. It can't be completely removed as the gas system requires it to function. Muzzle device: The muzzle device is similar to the military one but it is not pinned permanently and does not have a bayonet attachment. It is ½-28" thread and might be easily re- placed with any commercial muzzle device. Its perfor- mance might be compared to popular A2 style muzzle devices - it slightly decreases recoil and hides muzzle flash but it can't be compared with some more advan- ced devices. Ammunition and magazines: Our GROT has eaten many different rounds and got hiccups only after Barnaul rounds. It is cheap, poor quality, corrosive and shot-to-shot different. This was the main reason for failure. With some rounds from the same box, the gun worked flawlessly and some rounds jammed the rifle. The bolt was moving to the rear eno- ugh to extract the case but it was unable to load the next round to the chamber. Gas regulator position and magazine were out of the equation and after change of ammunition the problem was gone. Rifle was compatible with most of the magazines available except for the Magpul PMAG M3s polymer mag (unable to sit properly in the magazine well) and C Product Defense stainless steel mag (was seated too deep and there were problems with release). Recently we had some jams when fed from Troy Battlemags. Some users complain about the quality of the factory magazines but we haven't used it except for a couple of times. It shares some design with Battlemag and may- be that is the reason for jams. Failures: At some point the bolt wasn't locking in the rear after the last round. It happened with different rounds and magazines, with dirty and cleaned rifles. It started to happen more and more often so we finally decided to bring it back to Fabryka Broni. It was maintenance for… 15 minutes tops. The armorer told us that he just used some compressed air, then cleaned and lubed the bolt catch. All three rifles experienced the same type of "failure". During one shooting the double feed lookalike failure happened except the empty case was rotated to the left and next round was blocked in the feed ramp. After a closer look it became clear that the neck of the empty case was leaning on the edge of the ejection port (on the left side, covered with a plug). We were unable to extract the case and the partial disassembly was required. When the BCG was removed, the case was released. Another shot - same thing. What was the reason for the failure? Well, the user - author of these words. I took out the BCGs from all of the guns for a photo shoot and reinserted them in a left-hand con- figuration… Shame. Shame. Shame. Indeed, you won't be able to assemble the AR-15/18 with the BCG in such a way as bolt cam pins are asymmetric there but the GROT has symmetric cam pin for case extraction direc- tion change. Just pay attention during the assembly and place extractor toward the ejection port window. Similar, user-caused reason, was the loss of group accuracy during another shooting. We were unable to zero the new sight and the rounds were scattered on the target (50-100 meters distance). When I realised the fact that the rifle was cleaned two days earlier, I checked the rifle again it became clear that the barrel wasn't secured properly. Thankfully I had a Leatherman Tread with basic keys and I was able to attach the bar- rel in a proper way. Problem was solved. The firing pin broke after around 2,500 rounds were fired. When I took a closer look at it, it was clear that eventually it would break anyway. The design of firing pins in the early rifles had thickened parts stabilizing the moving pin in the spacing sleeve which were gene- rating some stress on them. Physics, that's why it bro- ke. The firing pin was replaced with the redesigned one which lacks the thickened part. Ultimately, the firing pin in the A2 version of the firing pin was redesigned together with its spacing sleeve in the bolt, so it won't break even after multiple dry fire drills. Cleaning: www.fragoutmag.com

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