I'm getting ready to build an AR pistol upper in 300 blackout with a barrel from Delta Company Arms. I'm primarily interested in shooting suppressed subsonic, but will likely end up loading up a few supersonic rounds to play with down the road.
Is there any substantial reason to go with either 9 or 10.3 inch barrel length? Or is that 1.3 inch difference of barrel not nearly enough to matter either way?
9 inch vs 10.3 inch AR barrel
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9 inch vs 10.3 inch AR barrel
"Our Country won't go on forever, if we stay soft as we are now. There won't be any America because some foreign soldiery will invade us and take our women and breed a hardier race!"
-Lt. Gen. Lewis B. "Chesty" Puller, USMC
-Lt. Gen. Lewis B. "Chesty" Puller, USMC
Re: 9 inch vs 10.3 inch AR barrel
10.3 has more velocity.
9 is more compact.
9 is more compact.
Re: 9 inch vs 10.3 inch AR barrel
I understand that typically speaking a longer barrel length = higher velocity, but what does the 10.3 inch barrel gain over a 9 inch barrel? 50 FPS? 100 FPS?
Also, when shooting full power/supersonic ammo through a 9 inch barrel with a suppressor attached is baffle erosion a concern with this cartridge like shorty 5.56 barrels? What about with a 10.3 inch barrel?
Also, when shooting full power/supersonic ammo through a 9 inch barrel with a suppressor attached is baffle erosion a concern with this cartridge like shorty 5.56 barrels? What about with a 10.3 inch barrel?
"Our Country won't go on forever, if we stay soft as we are now. There won't be any America because some foreign soldiery will invade us and take our women and breed a hardier race!"
-Lt. Gen. Lewis B. "Chesty" Puller, USMC
-Lt. Gen. Lewis B. "Chesty" Puller, USMC
Re: 9 inch vs 10.3 inch AR barrel
No, not at all like the 5.56.tReznr wrote:Also, when shooting full power/supersonic ammo through a 9 inch barrel with a suppressor attached is baffle erosion a concern with this cartridge like shorty 5.56 barrels? What about with a 10.3 inch barrel?
Kick Ass Design
Re: 9 inch vs 10.3 inch AR barrel
I bet that in most applications, you would hardly notice 1.3" of difference in performance. Unless you plan to run an unusual forend that won't work with a 9" barrel. I'd say go with the short one, since you plan to primarily run it subsonic silenced anyway. I don't think you could reasonably tell the erosion difference between the 2. Sure, the longer would erode a can less, but by how much? I'd say little.
Tom
Tom
Re: 9 inch vs 10.3 inch AR barrel
About 8 fps for subsonic and 45 fps for supersonic. It is small, and that is why we make 9 inch barrels and not 10 inch barrels.tReznr wrote:I understand that typically speaking a longer barrel length = higher velocity, but what does the 10.3 inch barrel gain over a 9 inch barrel? 50 FPS? 100 FPS?
Re: 9 inch vs 10.3 inch AR barrel
Thanks for the feedback guys. 9 inch barrel it is!
"Our Country won't go on forever, if we stay soft as we are now. There won't be any America because some foreign soldiery will invade us and take our women and breed a hardier race!"
-Lt. Gen. Lewis B. "Chesty" Puller, USMC
-Lt. Gen. Lewis B. "Chesty" Puller, USMC
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Re: 9 inch vs 10.3 inch AR barrel
The only reason we even make both is that slot of people like handguard/can combos that won't quite work with the9". Performance is negligible between the two as Robert said.
Regards,
Aaron Fouraker
Co-Owner
Delta Company Arms, LLC
(918) 332-6503
[email protected]
www.deltacompanyarms.com
IN GOD WE TRUST.
Aaron Fouraker
Co-Owner
Delta Company Arms, LLC
(918) 332-6503
[email protected]
www.deltacompanyarms.com
IN GOD WE TRUST.
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