4 New AR 15 barrels IN STOCK- 5.56 and 300BLK! 5/15/12

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4 New AR 15 barrels IN STOCK- 5.56 and 300BLK! 5/15/12

Post by WilsonCombatRep » Wed May 16, 2012 9:11 am

Guys,
We have 4 new model AR15 barrels instock and ready to ship as of 5/15/12! 2 are chambered in 5.56( mid gas), and 2 in 300BLK(carbine gas). All 4 are 18", and here are the links....

5.56 Fluted

5.56 Unfluted

300BLK Unfluted

300BLK Fluted

Image

Hurry before they are GONE!
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Re: 4 New AR 15 barrels IN STOCK- 5.56 and 300BLK! 5/15/12

Post by 6camaro9 » Mon Jul 09, 2012 7:35 pm

when will more 300 BLK barrels be in stock?

thanks

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Re: 4 New AR 15 barrels IN STOCK- 5.56 and 300BLK! 5/15/12

Post by WilsonCombatRep » Wed Jul 11, 2012 12:26 pm

6camaro9 wrote:when will more 300 BLK barrels be in stock?

thanks

We are shipping AR barrels daily but they are all heavily backordered at this time. I suggest getting a backorder in place.
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Re: 4 New AR 15 barrels IN STOCK- 5.56 and 300BLK! 5/15/12

Post by DrillersGoDeeper » Sun Jul 15, 2012 12:30 am

I'm having a guy build me a 300 BLK AR with one of your 16" stainless fluted heavy barrels. Been waiting on it for nearly 6 months.... You have to be waaaaaaay back ordered for it to take this long...
AAC 16" 300 AAC BLK 1:7", BCM lower
Wilson Combat 16" 300 AAC BLK 1:7" Spikes Tactical lower
S&W M&P 15 556 AR 1:8" 5R
to name a few...

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Re: 4 New AR 15 barrels IN STOCK- 5.56 and 300BLK! 5/15/12

Post by L1A1Rocker » Sun Jul 15, 2012 12:15 pm

You're building 18" 300 BLK barrels???? SAMI spec specifies 16" do to standardized sub-sonic factory loading. Do you not see a problem with your 18" barrels and sub-sonic factory loads that may be in the unstable trans-sonic velocity? As I recall Savage tried this with 20" barrels with very poor results.

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Re: 4 New AR 15 barrels IN STOCK- 5.56 and 300BLK! 5/15/12

Post by WilsonCombatRep » Tue Jul 17, 2012 6:43 pm

L1A1Rocker wrote:You're building 18" 300 BLK barrels???? SAMI spec specifies 16" do to standardized sub-sonic factory loading. Do you not see a problem with your 18" barrels and sub-sonic factory loads that may be in the unstable trans-sonic velocity? As I recall Savage tried this with 20" barrels with very poor results.

Most people buying an 18" barrel are looking for supersonic performance, not necessarily sub.
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Re: 4 New AR 15 barrels IN STOCK- 5.56 and 300BLK! 5/15/12

Post by L1A1Rocker » Tue Jul 17, 2012 7:58 pm

WilsonCombatRep wrote:
L1A1Rocker wrote:You're building 18" 300 BLK barrels???? SAMI spec specifies 16" do to standardized sub-sonic factory loading. Do you not see a problem with your 18" barrels and sub-sonic factory loads that may be in the unstable trans-sonic velocity? As I recall Savage tried this with 20" barrels with very poor results.

Most people buying an 18" barrel are looking for supersonic performance, not necessarily sub.
So you do recognize the possible incompatibility of an 18 inch barrel with factory sub-sonic ammo. Are your barrels going to be marked as such?

I ask because someone, somewhere, is eventually going to get one of these barrels; and then they will gripe about how bad accuracy is with the 300 BLK sub-sonic not realizing that the problem is a barrel not to SAMI specifications.

On edit: I followed the link on one of you 300blk barrels and found this in the discription:
The 300 Blackout (300 BLK) was designed by Remington/AAC to create a reliable, compact .30 caliber round for the AR platform that uses a standard bolt and magazine. 300 Blackout is optimized for suppressed fire with heavy bullet subsonic loads but can also be used with supersonic ammunition when extra range is needed. The 1-8” twist will work well for subsonic and supersonic loadings alike and there is typically no need for an adjustable gas block when switching back and forth between the two loadings.
YOU ARE ADVERTISING THIS AS SUB-SONIC but you stated "Most people buying an 18" barrel are looking for supersonic performance, not necessarily sub." It is plainly clear that know very well that this barrel is NOT going to perform well with factory sub-sonic ammo but are advertising it that way. WHY are you doing this???

Am I the only one seeing a problem with what WilsonCombat is doing here?

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Re: 4 New AR 15 barrels IN STOCK- 5.56 and 300BLK! 5/15/12

Post by WilsonCombatRep » Tue Jul 17, 2012 10:56 pm

We are aware that SAAMI 300 BLK ammunition is optimized for a 15-16" barrel.
We are also aware that there is a demand for longer 300 BLK barrels than 16" for folks who are primarily interested in shooting 300 BLK supersonic (competition, hunting). Not all states allow suppressors for purchase or for hunting.

Many BLK 3-Gun shooters are using longer barrels like this to get a little more supersonic velocity to make "Major" and several manufacturers offer 18" 300 BLK barrels.

The 1-8" twist offers enough stability for transonic rounds at the typical ranges that subs are used. Savage rifles had a 1-10" twist FYI.
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Re: 4 New AR 15 barrels IN STOCK- 5.56 and 300BLK! 5/15/12

Post by L1A1Rocker » Tue Jul 17, 2012 11:42 pm

WilsonCombatRep wrote:We are aware that SAAMI 300 BLK ammunition is optimized for a 15-16" barrel.
We are also aware that there is a demand for longer 300 BLK barrels than 16" for folks who are primarily interested in shooting 300 BLK supersonic (competition, hunting). Not all states allow suppressors for purchase or for hunting.

Many BLK 3-Gun shooters are using longer barrels like this to get a little more supersonic velocity to make "Major" and several manufacturers offer 18" 300 BLK barrels.
Your add clearly contradicts your statement. Again, from your ad for the 18 inch barrel:
Optimized for Subsonic Ammunition
http://shopwilsoncombat.com/Wilson-Comb ... R-300RC18/
WilsonCombatRep wrote:
The 1-8" twist offers enough stability for transonic rounds at the typical ranges that subs are used. Savage rifles had a 1-10" twist FYI.
Please explain how your barrel (at any twist rate) can stabilize a TRANSONIC round when no other barrel can? It is the velocity of the bullet exiting the barrel that puts the bullet into the unstable transonic speed - not the twist rate. Is it your assertion that the problem Savage had was in no part connected to the barrel length? Have you tested this 18 in barrel's accuracy with subsonic ammunition? Can you please post the results if so?

So, you have advertised an 18 in barrel as "optimized for subsonic ammunition" that will result in a transonic (at your own admission) bullet that was designed to be subsonic from a 16 inch barrel. The big question now, when people complain about poor accuracy with sub-sonic factory ammunition, will you blame the ammunition, the 300 BLK in general (like Savage did), or the out of SAMI spec barrel length?

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Re: 4 New AR 15 barrels IN STOCK- 5.56 and 300BLK! 5/15/12

Post by WilsonCombatRep » Wed Jul 18, 2012 12:02 am

There is a false assumption that adding 2" to the barrel will immediately equate to transonic velocity.
And yes, the more stable a bullet is the more stable it will be if it enters the transonic range-hence the new 1-7" twist barrels being sold.
This is a subject of lively debate on many long range rifle forums.

IMO, Savage's problem was a twist issue. They don't make a barrel with a twist faster than 1-10" and didn't seem prepared to re-tool for the 300 BLK.


The "optimized for subsonic ammunition" disclaimer is on our website to alert folks that the rifle will have gas ports sized for reliable subsonic use.



From Wikipedia
The transonic problem
When the velocity of a rifle bullet fired at supersonic muzzle velocity approaches the speed of sound it enters the transonic region (about Mach 1.2–0.8). In the transonic region, the centre of pressure (CP) of most bullets shifts forward as the bullet decelerates. That CP shift affects the (dynamic) stability of the bullet. If the bullet is not well stabilized, it can not remain pointing forward through the transonic region (the bullets starts to exhibit an unwanted precession or coning motion that, if not damped out, can eventually end in uncontrollable tumbling along the length axis). However, even if the bullet has sufficient stability (static and dynamic) to be able to fly through the transonic region and stays pointing forward, it is still affected. The erratic and sudden CP shift and (temporary) decrease of dynamic stability can cause significant dispersion (and hence significant accuracy decay), even if the bullet's flight becomes well behaved again when it enters the subsonic region. This makes accurately predicting the ballistic behaviour of bullets in the transonic region very difficult. Further the ambient air density has a significant effect on dynamic stability during transonic transition. Though the ambient air density is a variable environmental factor, adverse transonic transition effects can be negated better by bullets traveling through less dense air, than when traveling through denser air. Because of this, marksmen normally restrict themselves to engaging targets within the supersonic range of the bullet used.[12]
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