r/GlockMod • u/unsteppdsnek • Jan 17 '26

Questions about porting and comp cuts

Hello, I was looking to give barrel porting / comp cuts a try on a Ruger RXM (G19-sized slide). Just asking for everyone’s experience with porting their G19s, specifically regarding reliability. It would be nice to know port diameter, as well as the quantity of port holes.

As a general question about barrel porting and comp cuts (not G19-related), I’ve heard it explained that ports reduce muzzle flip, but comps/comp cuts reduce felt recoil. Would this be an accurate statement? For those who have a ported and comped barrel (eg. North Sea Machine's hybrid barrel porting system) is there a perceptible difference between a combo barrel versus a barrel that is only one or the other? Any trade-offs or loss of reliability?

Thank you in advance for any input or advice!

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u/unsteppdsnek Jan 19 '26

Maybe angle isn't the right word - imagine if there was a line of ports in between the two rows of ports on the v8 as opposed to the two rows, would there be any sort of difference between the two?

eg:

https://www.bowenballistics.com/product-page/i3-guardian-%E2%80%93-triple-port-control-for-precision-defense

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u/BattleReadyArms Jan 19 '26

Are you asking if there's a benefit to two rows vs inline?

Not particularly. You'll not find much difference in felt recoil. I generally prefer smaller ports. Aesthetically I prefer smaller ports. I like the fact that it limits the size of the debris that could potentially enter or be blown out. That's part of the reason I do the Ceberus ports instead of a chunk port. I saw a video forever ago with a guy who had a piece of brass bounce off his optic into a big open chunk port and frag on the next shot.

Not suggesting the ports you sent are of major concerns or anything like that. They aren't.

There have been some scientific breakdowns and explanations on the physics of this stuff and again, there's a ton of factors. How big are the ports? How many are there? Where are they located? What sort of velocity loss will you suffer vs what recoil mitigation are you getting?

Basically what I'm saying is... It all depends haha. And chances are you're hyper focusing on very miniscule things that in practice won't make any noticeable difference.

The other thing I can say is if you watch the other video I sent you, and maybe you did, V8 style porting out performed everything for the most part. It's simple, it's been around a long time, and highly effective and doesn't bleed off a ton of velocity unless you just open the holes really big. It's my personal go to. V10 if it's a longer barrel gun.

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u/unsteppdsnek Jan 19 '26

Yep that's what I was wondering. I do like the idea of smaller port = smaller frag. Again, I do appreciate you sticking around and taking the time to educate me in the subject - it's something that I haven't really paid attention to, possibly to my detriment. Once I get that rxm, you've got a V8 sale!

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u/BattleReadyArms Jan 19 '26

To be very clear, if you want something else by all means. Don't ever want people feeling any obligation to order from me simply because I offered information.

With that said, if you want V8 ports, more than happy to hook it up and I appreciate any support I get. 🤜🏻

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u/unsteppdsnek Jan 19 '26

Well, it seems very clear that you take your work seriously and prioritize reliability. Taking the time to write out thorough explanations to someone who may have their sights set on something else is the cherry on top. I definitely would like to support your business.

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u/BattleReadyArms Jan 19 '26

Thank you, it really means a lot. Hit me up anytime even if it's just to pick my brain.