Yes, most suppressors are only warranted for 10.5" min. barrels. Not to sure if .2 will make that much of a difference though.
Jk
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Yes, most suppressors are only warranted for 10.5" min. barrels. Not to sure if .2 will make that much of a difference though.
Jk
I would ask the manufacturer. Since the issued Mk18 is a 10.3" I wouldn't think it would be a problem.
I think they but that length as its the smallest common SBR size that is approved, meaning no 7.5" pistol lengths (for 5.56 cans anyways).
Kind of a parralel discussion here (over at the AR pistol area.) I sent some emails out to various manufacturers and here is what I got.
From Gem-tech.
Well, essentially, yes. We do not warranty any damage to the suppressor caused by use on barrels less than 10.5". Were you to shoot the suppressor on a barrel that short, there is risk of excessive wear, baffle strikes, and other damage. Even if you shot the suppressor on a 7.5" barrel without any visible damage to the suppressor, and then moved it back to a longer barrel where it was then damaged, in all likelihood, the damage was caused by use on the short barrel which weakened the suppressor and therefore the damage would not be covered under warranty.
Fact is, you've invested a lot of money in obtaining this suppressor.
Don't risk throwing it away by using it on a 7.5" barrel. Use the pistol
for what it was meant to be... A fire-breathing dragon. They just aren't suitable for use with a suppressor. The cartridge was never intended for a barrel that short.
From Surefire.
Dear Customer,
Most 5.56 rifles are equipped with 1/7 twist barrels (1 full rotation per 7 inches of barrel). This provides for a little over one full turn in the rifling before the bullet is released when used in a 7.5" Barrel. Due to the lack of gyration imparted on the projectile, the round will not be properly stabilized during the first few inches of flight, and while it is entirely plausible that the round will eventually stabilize further downrange; it will likely strike a baffle before it has the opportunity to do so. The effect is further worsened when using a 1/8 or 1/9 twist barrel. Additionally, these short barrel rifles (<10.5") typically do not yield adequate velocity upon the projectile within that short 7" of barrel, further augmenting the aforementioned stability issue.
If the Mini was used on a 7.5” AR pistol and you were fortunate enough to not encounter a baffle strike, you would note that the effectiveness of the suppressor would be decreased. Most of the unburnt powder would ignite upon leaving the Suppressor, providing for plenty of noise and flash. Furthermore, when used in conjunction with a short barreled rifle, service life of a Suppressor will be drastically shortened. The 5.56mm cartridge was designed to burn all powder within a 20" barrel (e.g. M16A1, M16A2). Maximum pressure and temperature is achieved roughly 7" from the chamber of the rifle; in close proximity to the access-chamber of the Suppressor. The hot and high pressure particles of unburnt powder are then accelerated through the baffles of your Suppressor, putting disproportionate wear on your product. Your SureFire Suppressor (Including the Mini and 212 Suppressors) will still be covered under our warranty if used on a barrel length less than 10.5”
The only exception to this is the 5.56 Micro Suppressor; Using this on anything shorter than 14” is outside of the intended scope of the product, and will void the warranty. Thank You
SRT Arms was somewhat vague, but they basically said that there was too much bullet yaw for barrels under 10.5" and they actually preferred at least 11 inches.
Owner/Instructor at Semper Paratus Arms
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Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com
So you think the 10.3 would be ok? I wouldn't be planning to add a suppressor at first, so I'd be running it without one for awhile. Anyone using a BattleComp on one?
"It makes no difference what men think of war, said the judge. War endures. As well ask men what they think of stone. War was always here. Before man was, war waited for him. The ultimate trade awaiting its ultimate practitioner."
I think a properly constructed and quality 10.3" would be ok. I remember that when I was researching on how to configure my SBR I took some of this info into account and decided that an 11.5 the best compromise.
I still feel that the extra inch in length may not be as cool, but it seems to be working jus fine for me.
Owner/Instructor at Semper Paratus Arms
Facebook: https://www.facebook.com/SemperParatusArms/
Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/
M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141
Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com
Yeah, I have 2 lowers out to be engraved, so I wanted to do one real short, with plans on suppressing it eventually, and do the other unsuppressed, like a 12.5 or 11.5.
"It makes no difference what men think of war, said the judge. War endures. As well ask men what they think of stone. War was always here. Before man was, war waited for him. The ultimate trade awaiting its ultimate practitioner."
If you do that Id say make the 2nd one a 12.5".
for 5.56, 10" or more is warranted.
Yes, as far as can life, 11.5 and 12.5+ will make an fair improvement.
This can be somewhat offset by using Brakes, or Brakeouts on really short guns. But, to be honest, we've been running even older model cans for years and years with just flash hiders and they hold up very well.
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If you look at the AAC 51T brake for the M4-2000 it basically adds 2 baffles to soak up some of the unburnt powder and erosion. So the brake takes some of the abuse off the can.
Major Malfunction had a post about it on Silencertalk
Last edited by m249saw; 10-17-10 at 17:43.
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