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1/4/2007 7:30:26 PM EDT
I know 147 grain 9mm generally stay subsonic in handgun length barrles, but I have a 10.5 in. barrel on a 9mm AR SBR, will these loads generally stay subsonic with the longer barrel?  Also I am looking into buying a can that will work well on both the AR and my MP5 and MP5K PDW.  Both of the MP5's have three lug barrels.  Based off of the information I have received from this board I am leaning towards to Gemtech Stricker II or the SWR Trident.  I have no intention of shooting the can on a pistol, so the interchangability of the SWR is not a factor.  I am looking exclusively for the quitest perceived can on the market.
1/4/2007 7:47:16 PM EDT
[#1]
All 147gr ammo except for Winchester White Box stays subsonic in my MP5. I like American Eagle and Special K.

The Striker II is a AAC suppressor and not a Gemtech. As for three lug cans for the guns you mentioned I would either do a SWR Trident or QD3K , a AAC Striker II or a Gemtech Raptor. The SWR QD3K is like the Trident but does not have interchangeable mounts. I have an SWR Trident and love it but you can not go wrong with any of those suppressors.
1/5/2007 4:00:13 AM EDT
[#2]
Our experience is that in the longer barrel of a subgun, not all 147 gr commercial ammo remains subsonic. Please also remember that there is a LOT of flight noise in the transsonic region (within 7% of the speed of sound) that may actually be louder than the ballistic crack itself.

Philip H. Dater/GEMTECH
1/5/2007 4:09:48 AM EDT
[#3]
I use the Federal American Eagle 147gr load in my Uzi (10.2" barrel) with a suppressor. The bolt noise is annoying loud, but the ammo stays subsonic
1/5/2007 4:56:38 AM EDT
[#4]

Quoted:
I know 147 grain 9mm generally stay subsonic in handgun length barrles, but I have a 10.5 in. barrel on a 9mm AR SBR, will these loads generally stay subsonic with the longer barrel?  Also I am looking into buying a can that will work well on both the AR and my MP5 and MP5K PDW.  Both of the MP5's have three lug barrels.  Based off of the information I have received from this board I am leaning towards to Gemtech Stricker II or the SWR Trident.  I have no intention of shooting the can on a pistol, so the interchangability of the SWR is not a factor.  I am looking exclusively for the quitest perceived can on the market.


I own an SWR QD3K and use it in my M16/9.  Unless you need the smaller size of the Striker I don't think it's worth considering.  Sound wise the QD3K (and the Trident) are  noticable quiter.  I've never heard a Raptor so I can't comment on that one.
1/5/2007 5:00:15 AM EDT
[#5]
Thanks for the info guys.  This confirms what I was thinking, there are no absolutes.  I appreciate the help.  As a follow up question, which factory loaded 9mm generally produces the lowest velocity.
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