Yeah, this is it. I do most of my shooting inside a range house that's open on the front. Diminishing/Redirecting noise and blast is a priority...
So, a bigger chamber seems better, and baffles are a big no-no.
Diminishing returns: I don't think I'm there yet. From my perspective, "in for a penny... " and if I'm going to spring for a linear comp and deal with the added length and weight, then an empty can isn't thaaaat much longer/heavier/pricier.
Maybe. I'm thinking at the keyboard...
JoeBob sells KVP's XL comps for less than $40. Even the steel "magnum" comp is less than $50.
A 6" long and 1" diameter tube ($30) and the end caps ($20 each) from QuietBore costs $70:
https://www.quietbore.com/product-ca...-2/22lr-parts/
A 7"x1.25" tube with end caps would be about $100:
https://www.quietbore.com/product-ca...s-2/9mm-parts/
A 9"x1.5" steel tube would be about $100-120 (for whatever reason QuietBore doesn't list the entrance caps separately), but that seems like too much for anything except a semi-auto 5.56mm...
https://www.quietbore.com/product-ca...-30-cal-parts/
My 14-year-old is doing non-stop PSAT practice tests these days, so I'll put her to work calculating the approximate volumes of these chambers...
I know that it's possible to print 3D metal parts, but I don't think I would trust it not to go to pieces...
FWIW, the KVP "magnum" comp is kind of a scaled up BRT Covert Comp or Griffen M4SD.
It's steel and heavy (6oz), and I would only consider it for a "precision" upper (a gun that wouldn't handle all that well, anyway).
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