Go Back   Maryland Shooters > The Arsenal > NFA/Class 3/Title II
Don't Have An Account? Register Here

Join MD Shooters
Reply
 
Thread Tools Display Modes
Old November 29th, 2020, 05:35 PM #1
calicojack's Avatar
calicojack calicojack is offline
American Sporting Rifle
 
Join Date: May 2018
Location: East Bumfkgypt
Posts: 2,596
calicojack calicojack is offline
American Sporting Rifle
calicojack's Avatar
 
Join Date: May 2018
Location: East Bumfkgypt
Posts: 2,596
5.56 End Cap Worth Getting for a 7.62 Can?

If I am shooting 5.56 and 300 Black (and 6.5 Grendel), is it worth it to get a 5.56 endcap for the 5.56? Or is that going to create more back pressure and do little or nothing for noise reduction at the ear on an AR?
__________________
I know in my heart that man is good, that what is right will always eventually triumph and there is purpose and worth to each and every life.
--Ronald Reagan
calicojack is offline   Reply With Quote
Old November 29th, 2020, 08:30 PM #2
lazarus lazarus is offline
Senior Member
 
Join Date: Jun 2015
Posts: 7,453
lazarus lazarus is offline
Senior Member
 
Join Date: Jun 2015
Posts: 7,453
For noise reduction at the ear, likely no real impact with a DI gun. As you pointed out, more back pressure.the bit of testing I’ve seen, a proper end cap might drop noise volume 2-3dB. But with a DI gun, that’s only going to be at the muzzle, not the ear.
lazarus is offline   Reply With Quote
Old November 29th, 2020, 09:51 PM #3
Major03 Major03 is offline
Senior Member
 
Join Date: Jan 2013
Location: Northern Maryland, Baltimore County
Posts: 1,646
Major03 Major03 is offline
Senior Member
 
Join Date: Jan 2013
Location: Northern Maryland, Baltimore County
Posts: 1,646
Better remember to switch it out if you swap the can over to a bigger bore rifle.

I have one...used it once. I can't discern a difference in decibels and it isn't worth the risk ans hassle of swapping it out
Major03 is offline   Reply With Quote
Old November 29th, 2020, 10:44 PM #4
SWO Daddy SWO Daddy is offline
Senior Member
 
Join Date: Jun 2011
Posts: 2,040
SWO Daddy SWO Daddy is offline
Senior Member
 
Join Date: Jun 2011
Posts: 2,040
You're mostly just increasing the chances of an endcap strike.
SWO Daddy is offline   Reply With Quote
Old November 30th, 2020, 07:22 AM #5
alucard0822's Avatar
alucard0822 alucard0822 is offline
For great Justice
 
Join Date: Oct 2007
Location: PA
Posts: 15,193
Images: 11
alucard0822 alucard0822 is offline
For great Justice
alucard0822's Avatar
 
Join Date: Oct 2007
Location: PA
Posts: 15,193
Images: 11
Much depends on the can and the rifle/ammo. Increasing backpressure with a smaller cap can increase the ejection port bark, and make it sound louder unless you tune an AGB for it. Some of the older cans could show a decent reduction with a smaller cap, and much quieter with a wipe. Newer cans seem to be more efficient in general, and rely on turbulence by clips/ports to slow gas in the baffles and less on the bore diameter itself. That being said, if you can, try it. I have an Optimus with 22 and 9mm endcaps, not much difference at the ear with the "full/mid" config in 5.56 especially with short barrels and hot ammo, but a noticeable difference on 22s, and in 5.56 with the less efficient short/K configuration(only after the AGB is re-tuned). From a practical standpoint though, most of my 5.56 rifles can be tuned to a spot with my 30cal and 9mm cans where they are pleasant to shoot suppressed, and function reliably unsupressed. I don't always get that nice spot of overlap in function when adjusting for the smaller and more restrictive 22 cap.
__________________
"Unfortunately, freedom allows sh*theads to get away with stuff. You always know the mark of a coward. A coward hides behind freedom. A brave person stands in front of freedom and defends it for others."
-Henry Rollins
alucard0822 is offline   Reply With Quote
Old November 30th, 2020, 08:27 AM #6
fbi_surveillance_van fbi_surveillance_van is offline
Senior Member
 
Join Date: Jan 2017
Posts: 1,370
fbi_surveillance_van fbi_surveillance_van is offline
Senior Member
 
Join Date: Jan 2017
Posts: 1,370
Replaceable end caps are awesome because you can replace them in the event of a bullet strike. It’s also nice to customize the can with a flash hiding end cap, brake (dead air e brake), etc. I would generally recommend getting a caliber specific end cap only in cases where you are going to leave the can on a single rifle that you can tune to function with the higher back pressure, or for manually operated firearms.
fbi_surveillance_van is offline   Reply With Quote
Old December 2nd, 2020, 12:10 AM #7
rockstarr's Avatar
rockstarr rockstarr is offline
Major Deplorable
 
Join Date: Feb 2013
Location: The Bolshevik Lands
Posts: 4,506
rockstarr rockstarr is offline
Major Deplorable
rockstarr's Avatar
 
Join Date: Feb 2013
Location: The Bolshevik Lands
Posts: 4,506
Do wipes really make that much of a sound reduction difference? Wondering if they are worth using on a wolfman I hopefully have coming out of jail shortly
__________________
Be a humble person, for you are no better or anymore special than the person next to you...
rockstarr is offline   Reply With Quote
Old December 2nd, 2020, 02:30 AM #8
fbi_surveillance_van fbi_surveillance_van is offline
Senior Member
 
Join Date: Jan 2017
Posts: 1,370
fbi_surveillance_van fbi_surveillance_van is offline
Senior Member
 
Join Date: Jan 2017
Posts: 1,370
The Wolfman should come with at least one wipe (mine did), so feel free to experiment for yourself. Generally speaking wipes reduce sound significantly, increase back pressure significantly, and cause significant POI shift.
fbi_surveillance_van is offline   Reply With Quote
Old December 2nd, 2020, 11:07 AM #9
Cobra121 Cobra121 is offline
Junior Member
 
Join Date: Oct 2019
Location: Anne Arundel County
Posts: 7
Cobra121 Cobra121 is offline
Junior Member
 
Join Date: Oct 2019
Location: Anne Arundel County
Posts: 7
The 556 cap will provide minimal reduction with that round. I had the same question on my omega 300. No worth it. You can’t even tell the difference. 556 is too fast and noisy of a round. Stick with the bigger end cap
Cobra121 is offline   Reply With Quote
Old December 2nd, 2020, 11:38 AM #10
GolfR's Avatar
GolfR GolfR is offline
Senior Member
 
Join Date: Oct 2016
Location: Columbia MD
Posts: 1,275
GolfR GolfR is offline
Senior Member
GolfR's Avatar
 
Join Date: Oct 2016
Location: Columbia MD
Posts: 1,275
For 5.56 I’ve swapped end caps once and didn’t notice a real word difference. With the super sonic crack along with the function of the gun right by my head I just couldn’t make out a difference. If shooting a bolt gun it may be more decernable. If you plan to use the can for 22lr, there is a noticeable difference when shooting subsonic rounds by changing the cap.
GolfR is offline   Reply With Quote
Reply

  Home Page > Forum List > The Arsenal > NFA/Class 3/Title II


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:26 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
2021, Congregate Media, LP Privacy Policy Terms of Service