Thnx. I have remained skeptical if comps do much for 9 mm guns. I have said it here before, I wish someone made a non-ported weight to screw on a threaded barrel and run it against a real comp. That said, if those are interchangeable with .357, maybe I'll play with one.Originally Posted by JCN
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Have you had any issues with it causing malfunctions with factory 115 gr ammo?
Does it cause any snag issues with holsters since the front of the slide seems to bevel in further than the width of the comp?
I have not shot factory ammo in it except for 124 grain +P Gold Dots (it works fine with this). My practice ammo has a muzzle velocity of about 1150-1180 fps (so close to AE 115 gr FMJ). I have only about 2000 rounds in it, and so far so good.
It does not snag, and the edges are radiused nicely. It is not much wider than the point of the beveled slide. See below.
Last edited by Paul D; 03-06-2021 at 04:14 PM. Reason: Grammar
Thanks! I’ve been trying to find that exact angle for a while now.I have not shot factory ammo in it except for 124 grain +P Gold Dots (it works fine with this). My practice ammo has a muzzle velocity of about 1150-1180 fps (so close to AE 115 gr FMJ). I have only about 2000 rounds in it, and so far so good.
It does not snag, and the edges are radiused nicely. It is not much wider than the point the beveled slide. See below.
I may have to give one of these a try.
You mean like this?
Gemtech Aurora II suppressor, which has the distinction of being one of the smallest and lightest suppressors out there.
The important part is that it’s so light that it does not use a Nielsen (spring piston) device so it is the comparison you’re looking for.
If I wanted to be scientific, I’d remove the urethane wipes and just test it back to back with the empty housing as a rough equivalence to the comp.
I can do that next week with video if you like, but my impression is that comps do stuff.
It’s obviously a continuum. 9 major ammo is basically 357 Sig velocity in a smaller case. Hot 9mm +P+ is just a whiff slower and then down the continuum.
For some actual quantification, here is PMM testing their V1 and V2 comps.
They both have roughly the same weight and size. The V2 just has more holes. You can see quite a dramatic reduction in muzzle rise with the addition of the second hole testing normal factory 9mm.
I think it gives a good sense of how much (or little) a comp is doing for 9mm.
I have a MBX 9mm PCC suppressor and all the vents are on the top and that definitely makes a difference, even with gamer ammo. That’s why I was thinking a straight vertical comp would be best for 9mm. Like a magna-port or a C model Glock.
I run one and I’m a fan. A guy at my USPSA club runs one quite a bit and never seems to have problems. Both gen5 FWIW.
Im looking forward to the 43X version.
I’ve got about 500 rounds through it with the comp. No issues cycling from Tula to HST. Definitely on board for the 43X version.
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Aren't the gen 3 Glock 17C and 19C pretty much the perfect factory example of this? There are videos around of them in mechanical rests that allow and measure the muzzle flip compared to a regular gen 3 g19/g17 side by side. If I'm remembering correctly there was something like a 30% reduction in muzzle rise with the "C" factory ported barrels barrels shooting box 9mm.
I am not very well versed in the subject but my understanding is that barrel porting bleeds off gases and reduces muzzle velocity by some %, hence reducing muzzle energy and momentum. So to me it looks like comparing two of the same pistols but one loaded with a softer ammo.
Separately: I do understand why people use mechanical rests for these tests but to me they don't tell much. What I want to know is not what those things do against no resistance but how much extra resistance on regular gun is needed to equalize both. In simpler words, if even a crappy grip is enough to overcome that 30% uninhibited rise difference then why bother. I very much prefer people running those on timers, even if that involves a human factor.
Bud, I'll take your word on this, no need to spend time and ammo on this.
I can do that next week with video if you like, but my impression is that comps do stuff.
I fully admit to having a low intensity bipolar attitude to comps on 9 mm. I've a very strong bias against them as a baseline attitude. Then Roland is the thing and I am thinking I should get one. Then a training buddy, strong M class, pokes his balls with one in AIWB while bending and takes it off in one week, proclaiming "they don't do much anyway", so I say screw it. Then Mayhem with small profile comes out, and Jody has like three of them, so I say maybe. Then CCforlife hits the GM and does well on the Nats with G26... The cycle never ends.
@GJM and @SteveB just made Mayhem people 800 bucks richer, so I guess I'll wait for their reports. Or ads in classifieds.
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I hadn't thought of that.
Looks like this guy ran a pretty comprehensive side by side chrono to test that.:
https://www.glocktalk.com/threads/gl...loads.1499605/
Seemed to drop about ~2% or ~30fps on average across 4 loads tested.
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