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Posted: 1/23/2007 4:37:52 PM EDT
| well i got to pick up my gemtech trinity today, and i wasn't to impressed by the sound reduction. i used 147gr sub sonic rem ammo in my colt 10" 9mm ar15. i even used this oil my class III dealer recommended and i didnt think it was that quite. do you guys have any recommendations? maybe ammo type? how much quieter would it be if i took off the 10" barrel and put a 5" tros barrel on it? thanks tom |
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It would be louder with the shorter barrel. Shorter barrel equals louder noise, with or without the can installed. You got yourself a Trinity, plain and simple, if the snake oil or ky jelly doesn't get it to your liking then there ain't nothing you can do about it. Thing to consider is....are you not happy with the action noise or the noise of the can? Nothing can really be done about the action noise, the can can be shot wet, thats about it. I have never been impressed with the Trinity system. There have been individuals at the range I shoot at before with the Trinity and then they heard my Trident and were amazed and ask what liquid I was using in it and I told them it was dry. They were amazed. The Trinity is simply lacking in volume thats all, and the blast chamber is surprisingly small. I personally load all my own ammo so I can change how loud it is(within reason). Remington ammo always seems to be on the hot side. TS |
Maybe the extra length of the barrel is making the bullets go super sonic? I really would have no idea if they would or not. Maybe put them on a chrono and see what the velocity is. That would tell you for sure. My form 4 for my first suppressor is still pending so I can't help you out about the oil... Hmmm.... should only be another week or two.  Magoo |
i think your right, i think the barrel length is making the bullets velocity pick up to much. i think it would be quieter with the shorter barrel. |
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If you don't have a chrono you could try using plain supersonic ammo with the 10" barrel and see if there's any noticable difference in the sound. That way you'd have a known supersonic bullet to compair sound. Like I said I don't have any experience but if they sound similar I'd say that they're both going super sonic. If there is a difference maybe it's the can or oil. Know what I mean Vern? my .03 Magoo |
I have shot the same ammo you describe(while my F1 was pending on my SBR) through my 16" AR and it is still subsonic(chrony verifes that as well). All my handloads are still subsonic through a 16". Unless it was below zero on the range you shouldn't be cracking the sound barrier. When you do it is VERY noticeable and you know that it isn't the suppressor doing it, that in fact it is going supersonic. Believe me you would know if that were happening. It is the can, if you were in Northern VA I would show you exactly what I mean. TS |
Water (which Gemtech doesn't recommend) is the only way its going to be quieter. I think you would know if it was going supersonic. The Trinity isn't the quietest 9mm can out there. I have one. |
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It will be louder on the shorter barrel, on the 5" barrel you might get away with some 124gr ammo subsonic rather than needing 147 to be subsonic. You might consider dedicating this silencer to a bolt action type gun where you can custom handload something underpowered and buy a new silencer to work on your AR. |
how would it perform if i were to put it on my beretta 92, also whats a good place to get the threaded barrels for the beretta, i would pefer the 1/2 36 my 9mm ar is threaded in. so i can use the same mount for both guns. |
its the first time ive ever fired one, ive seen a few but never heard them. i need to make this thing quitier, and suggestions? ammo..ect? |
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I'm confused, didn't you read the other posts here and haven't we already given you suggestions? Sorry if I am misreading this but we have already answered those questions...... Gemtech doesn't recommend water, so if you value your warranty don't use it. Ammo, be sure you are using subsonic, either chrony it yourself or load your own. If that doesn't make it quieter then nothing will. Only factors to consider. Platform noise. Ammunition selection. Thats it. Unfortunately it will most likely perform the same on a Beretta if not a shy quieter as the action of the Beretta is a little quieter than an 9mm AR. Listen to Dave's advice it is pretty sound. I would dedicate it to a bolt gun, and get a better can for the AR. I have shot the Trinity on my 9mm SBR and my MP5 and was totally disappointed in it. The can doesn't have the volume to suppress the 9mm sufficiently. My 5" AR will make a 124 handload go supersonic. Standard threading for 9mm is 1/2x36 unless you want it differently. Your Beretta 92 series is already ready to thread, have a competent gunsmith thread your barrel, there is just enough length on the barrel to have it threaded without having to buy an additional barrel. Unfortunately you will not achieve Hollywood quiet with suppressors but you can come close, unfortunately with the Trinity you won't. In regards to barrel length, the shorter the barrel the louder the discharge. One of the biggest reason is due to the lack of time that the powder is burning and the temperature of the gases. The longer the barrel the more time the gases burn and the cooler they become before leaving the barrel, less expansion in the air with cool gases versus hot gases. A short 7" AR(my personal favorite) is very very loud, probably 6 or 7 times as loud as a 16" AR. That is also why suppressed 10/22's are so much quieter than pistols. I think you get the idea. If the comment is based ONLY on whether the bullet is going supersonic or not then a 5" barrel won't make that difference unless your 147gr is incredibly hotter than mine(I load mine to 975fps, 75fps below the sound barrier, Rem is loaded to 1000fps still far enough below to be sub) -TS |
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