Haven’t heard any thing since late Mayhinking.gif.

Quoted: Haven’t heard any thing since late May.

I'm still doing my evaluation on it. I've fired minimal full-auto through it thanks to our fellow member Bookhound and have been putting it through the paces at long range.
I love the can and the method of attachment-I gotta run for now, but I'll post some highlights later....

When you get back could you post some pics, Please.

Mk12 Mod0 SPR sans Suppressor



Close up of the M4/SPR mount



Mk12 Mod0 w/ M4/SPR Suppressor Mounted



Close up of the latching mechanism, if you look closely you can see the engraved number for position 1 of the starting points.



Business end w/ "Front Towards Enemy" Engraving



As I said earlier-I like this can a lot. Below is my results from a recent range trip where I was doing some testing with the mounting positions of the can:

I first sighted in the rifle at a 100yds, I set up a number of 1" pasties and proceeded to sight in the rifle without the suppressor mounted. For record, I fired at 3 targets and easily put 5 shot groups well within the pasters on all 3. The rounds literally fell right on top of each other.
After getting the rifle sighted in, I mounted the can and obtained the following results as I rotated the can around to each of the 5 starting positions. I fired at 3 pasters for each of the groupings

-Position 1
Moved my POI 1/4MOA up and 1/4MOA right. This was verified on 2 of the 3. The 3rd pasters shift was still easily less than 1/2MOA.

-Position 2
Moved my POI 1 3/4MOA down and 3 3/4MOA to the right and was confirmed. This was by far the largest shift.

-Position 3
Moved my POI 1/4MOA to the right only. This was the best shift of all the positions.

-Position 4
Moved the POI 1MOA down and 1 1/4MOA to the right

-Position 5
Moved my POI exactly 2MOA straight up.

It was interesting to see how rotating the can caused such an impact on the shift of the groupings. After completing the test, I took the can off and shot a group. After seeing that the group fell where I expected, I reattached the can on Position 3 and fired another group that fell right where I expected. The testing that was done was verified by both the range master and a friend.

I should mention that the ratchet mount allows for the can to be mounted rock solid with ZERO wiggle and no possibility of coming loose-which I think is a bigger selling point than the ability to use 5 different starting positions. The 5 starting points are definetely nice, but my OPS Inc 12th Model is extremely repeatable being within 1/2MOA and doesn't have different starting positions on it.


I hope that's helped-I'll have a more thorough review completed in a few weeks.

Nice write up.  I wish my Mod-07 was that adjustable gggrrrr

Wolf

Lawman734

in your 2nd pic, you provide a close-up of the mount.  I am trying to determine how much length this mount adds to the length of the barrel. Is this mount basically the same as a vortex with regard to added length, with the majority of the mount actually extending back over the barrel (rearward of the crown), or (as it appears to me) does the crown sit approximately at the suppressor threads, with the added length of the mount being significantly more than something like a vortex?

nice pics, nice rifle, and an extremely informative write-up.
thanks

Quoted: Lawman734 in your 2nd pic, you provide a close-up of the mount.  I am trying to determine how much length this mount adds to the length of the barrel. Is this mount basically the same as a vortex with regard to added length, with the majority of the mount actually extending back over the barrel (rearward of the crown), or (as it appears to me) does the crown sit approximately at the suppressor threads, with the added length of the mount being significantly more than something like a vortex? nice pics, nice rifle, and an extremely informative write-up. thanks

The crown of the barrel is where the longest "tine" extends back to. As far as how much OAL is added to the rifle, I just checked and it's 1.5". The rest of it extends back over the barrel, which I didn't check but if I remember correctly-it's just shy of 2.5".

Quoted: To really tell the story, you need to make a few unknowns, known. I would like to see: Barrel threads checked to confirm they perfectly concentric to the bore. Internal and external threads on the mount checked to confirm they are perfectly concentric to each other. Put the mount in a lathe, and attach the suppressor to each point - checking the amount of runout at each point.

Steve, the barrel used here is a Broughton 5C that was turned and threaded by Jered Joplin at Patriot Arms. I don't have any doubts as to if he can thread a barrel concentrically or not.
As for checking the mount and chucking things up in a lathe and all that-I'm a cop doing a simple review and don't have the access to check things like that. All I can assume is that AAC's mount was in spec as I had less the 1/2MOA shift on 2 of the 5 thread starting points. I don't know what would cause such a shift on the other points and won't speculate.
You bring up something worth checking though and will swap suppressors on the SPR's. I'll finish up my evaluation using the M4/SPR on the Mod1 and put the Ops Inc on the Mod0.
As for the Ops Inc being perfectly concentric, I don't have any doubts to that. My personal thoughts are that if you can get a repeatable POI shift of less than 1/2MOA  every time, you are doing quite well-my 12th Model accomplishes this with no problems.

Quoted: The issue is its made to "spec", and I'm sure its within "spec". Having the  optional starting points is a way around taking the time required to make them properly. With the different starting points, odds are one will be "close enough".   The runout on the older M42K mounts, was substantial from mount to mout. The OPS cans/mounts are made by the same person, at the some time, in the same place. They arent "matched" but all made perfectly. The 14th model I've been abusing, (and bulged) - is still prefectly concentric on any mount.

Ahh-extremely good point and I didn't think of it like that. I'll see if I can't get my hands on another mount to check it out as well.

Quoted: The 1/4MOA shift is excellent.   My only opinion as far as flaws, is that I would rather probably have a can that threaded up 1.5 MOA off zero every time, than have one that I could grab and head to a truck in the middle of the night and mount at the wrong setting.   It would bother me for a precision rifle application. It's probably not easy to engineer, and possibly not possible at all, but it would be nice to have some means of insuring it would never mount any other way than the chosen position.   Agreed-I plan on putting a shallow divit into the area over the correct thread position so that it can be installed by feel, even in the dark. I've allready said the "front toward enemy"  is in its place only on Claymores that you don't want Forrest Gump emplacing backwards, but then concensus civilian opinion is that it is "cool".   Again, I agree with you completely. Regardless, it's there and isn't an option to not have it so we all have to live with it. Otherwise it looks like an outstanding product.. obviously.  Probably the best in this application, with it's superior flash reduction.  AAC has made leaps and bounds in the last five years. No argument from me at all. Comparing it to my Ops Inc 12th Model, it's agreed by a number of people who were present at the last SilencerShoot that the 12th Model seems slightly quieter-but you can't deny that this is an innovative product.

deleted

Quoted: I'm  glad others are learning/appreciating the simple effectiveness of a design that the “experts” dismissed as antiquated and inferior when I first posted my reviews over a year ago.

The problem is that you have a lot of new purchasers that insist on seeing the numbers and a few people who have decided to purchase the equipment providing info as if it's the end-all to everything. I'll be the first to admit that I was this way at first and it took a comparison early last year of an AAC Cyclone, SWR Omega30 and a Jet suppressor on the 3 similar rifles. The Jet, which is notorious for metering badly, sounded similar to the other 2 cans, but the "tone" (if that's what you want to call it) was different and actually sounded better to my ear-as well as the ears of several others.
While I love the AAC M4/SPR, the 12th Model is still by far my most favorite can and is the quietest of those I own. One of these days I might get a 15th Model, but I have other things in line first.

Would this can be a "bad" idea on a 16 inch gun with a mid-weight brl?

Mike

Quoted: Would this can be a "bad" idea on a 16 inch gun with a mid-weight brl? Mike

It depends what you want. The M4/SPR adds 1" less OAL to the weapon over an M4-2K and can be dialed in. As I said earlier, I think the better selling point is the ratchet mount (also available on the new M4-2K's)-but dialing the suppressor in is very nice as well. It's FA rated if that's your thing and balances very nicely on an M4 type of package-it shifts the balance rearward and doesn't feel like you have something hanging off the front of your weapon.

Quoted: Yes, the SPR/M4 cans are now available.  I'll have to dig through my photos, but I have some pics I'll try posting later. Mark

Hey Mark,
could the mount for the SPR/M4 be permanently attached to a 14.5"
barrel to make it a legal 16"??

Quoted: Quoted: Yes, the SPR/M4 cans are now available.  I'll have to dig through my photos, but I have some pics I'll try posting later. Mark Hey Mark, could the mount for the SPR/M4 be permanently attached to a 14.5" barrel to make it a legal 16"??

That was my next question!!

Mike

Quoted: Quoted: Quoted: Yes, the SPR/M4 cans are now available.  I'll have to dig through my photos, but I have some pics I'll try posting later. Mark Hey Mark, could the mount for the SPR/M4 be permanently attached to a 14.5" barrel to make it a legal 16"?? I'm pretty sure.  I can measure tonight to make absolutely sure though. Tell Alex I said hi.   Mark

Thank you sir, and will do!

Quoted: Quoted: Would this can be a "bad" idea on a 16 inch gun with a mid-weight brl? Mike It depends what you want. The M4/SPR adds 1" less OAL to the weapon over an M4-2K and can be dialed in. As I said earlier, I think the better selling point is the ratchet mount (also available on the new M4-2K's)-but dialing the suppressor in is very nice as well. It's FA rated if that's your thing and balances very nicely on an M4 type of package-it shifts the balance rearward and doesn't feel like you have something hanging off the front of your weapon.

I was under the impression the SPR/M4 was the same length past the muzzle as the new M42K Mod 7.

Quoted: Quoted: Quoted: Would this can be a "bad" idea on a 16 inch gun with a mid-weight brl? Mike It depends what you want. The M4/SPR adds 1" less OAL to the weapon over an M4-2K and can be dialed in. As I said earlier, I think the better selling point is the ratchet mount (also available on the new M4-2K's)-but dialing the suppressor in is very nice as well. It's FA rated if that's your thing and balances very nicely on an M4 type of package-it shifts the balance rearward and doesn't feel like you have something hanging off the front of your weapon. I was under the impression the SPR/M4 was the same length past the muzzle as the new M42K Mod 7.

Hmm.....Now I'm not so sure. I was under the impression that the new M4-2K added 5" and the M4/SPR added 4", at least that's what I remember Silvers saying. Bookhound-can ya clarify?

Quoted: They should both add ~4" past the end of the FS.  The FS should add the same length past the muzzle.   Mark

Damn, I guess I'm imagining things then....

I think you were thinking of the OLD M4-2000 which was indeed longer.  

I just got back from shooting my SPR/M4 on my 11.5" barrel.  It was very quiet but I could not get a group to save my life.  How much negative impact would hundreds of rounds of full auto and suppressed shooting without cleaning have on accuracy?  It was so bad I could not figure out if the different settings on the suppressor were acually doing anything.  It went from shooting just sub MOA when clean several months ago to 1.5-3 MOA after full auto and suppressed shooting (couple hundred a few weeks ago) and finally 4-5 MOA both suppressed and unsuppressed as I tried to shoot for groups today over about another 100 or so rounds.  

.

What happened at the range today?

.

OST

I'm trying to decide on whether to go with an SPR/M4 for my Lilja Recce (got the mount Mark - thanks!), but part of me wants to try a Ops 12th...

Quoted: OST I'm trying to decide on whether to go with an SPR/M4 for my Lilja Recce (got the mount Mark - thanks!), but part of me wants to try a Ops 12th...

ops.....

Quoted: What happened at the range today?

We started out shooting 75 grain Black Hills and 5.56 Hornady TAP and it was grouping in the 2 MOA range.  Later in the day we started getting consistant 4-5 MOA from Federal Tactical 62 grain, Honady 75 grain 5.56 TAP and Black Hills blue box 75 grain whether suppressed or not.  The last lot of 5.56 TAP that Adam had displayed heavy ejector smears inicating over presure and 2 of 20 had popped primers.  It was a sad, sad day.

Quoted: Quoted: Comparing it to my Ops Inc 12th Model, it's agreed by a number of people who were present at the last SilencerShoot that the 12th Model seems slightly quieter-but you can't deny that this is an innovative product. I'm  glad others are learning/appreciating the simple effectiveness of a design that the “experts” dismissed as antiquated and inferior when I first posted my reviews over a year ago.

I was ambivalent about the mount when I got mine, but I really like it now.  I can't shoot well enough to see any POI shift.

I think it was either my barrel was dirty or it is just crapped out after a few hundred rounds. An ABS barrel built off a Pac Nor blank.

Quoted: I think it was either my barrel was dirty or it is just crapped out after a few hundred rounds. An ABS barrel built off a Pac Nor blank.

I haven't seen anything since you asked in the Precision Rifles section-did cleaning it change anything?