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Posted: 11/9/2003 5:13:05 PM EDT
Tried firing an SPR with Ops Inc brake and had a chance to take some time lapsed photos of the muzzle flash. The brake eliminates a lot of flash to the shooter but it can still be detected through the scope for some reason (very slight). The lateral ports vent flame about an inch to two which you cant see from the angle of the photos. Notice the straight back recoil with no muzzle rise.  This gives you the best idea of the actual flash you see. These pics were taken at dusk and it was darker than the photo indicates as these were time lapsed or long exposure photos. Ammo was 75 grain Black Hills red box. |
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Quoted: Hey, the scope cover is closed? How well do you think the muzzle brake works as a brake? Well there is very little to compensate for. I think it has an effect but its not the most effective brake in the world. Then again its not very loud to the sides or shooter either. Edited to add: You will notice the rifle is also pointed DOWN. I didnt want any shots hitting my target at the 300 yard line just in case I had put all 5 rounds in the 4" bulls eye. The cap is see though so ultimate clarity was not an issue. |
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Next time you go out, try putting something down (like two layers of bath towel under the bipod feet). The rifles have more erratic flyers when you shoot from a hard surface like the cement in the photo. The best platform is probably the dirt, in the prone but most ranges won't allow prone shooting anymore. (That is if you are having any trouble getting the standard you need to extend your range.) |
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Yes I know about hard surfaces with bipods. The flooring is still concrete though but we can shoot prone on the 200-600 yard lines. I am thinking I could just go with sand bags to get the groups sub MOA at 300 and 400. The towel idea is a good one though. I will certainly have to try that as well as shooting prone. Thanks for the tip. |
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The SPR would not chamber Q3131A on multiple occasions. Even with the forward assist it failed to chamber two rounds. This upper will not be eating any Q3131A until more testing can be done. The barrel is a match chamber 1/8 with a bolt giving minimum headspace for maximum accuracy. Next time I bring her out I will test with Q3131A again and see if she still has problems. I will hand chamber a round of Q3131A if needed for a flash test too. Edited to add: I dont know if it hides flash compared to a bare 18" barrel as I dont have one to compare it too, but it does get the flash away from your line of sight and the flash signature is very low. |
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Quoted: So is this thing a break or a flash suppresor? Where do I get oNe? Yes [;)] It is a muzzle brake, but it is not BATF approved for post pan use, therefore it is, by default, legal only on preban rifles. Right now they are vaporware. If anyone will have them, it's Wes at MSTN. |
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IF AND WHEN WE GET THE OPS INC MILITARY BRAKES AGAIN, IT IS THE DESIRE OF THE OPS INC BOSS, MR PHIL SEBERGER, THAT THEY NOT (!!!) BE SOLD SEPARATELY, BUT ONLY WITH OUR PROPERLY CONTOURED SPR BARRELS OR ON OUR COMPLETED SPR UPPERS, JUST AS WE HAVE DONE IN THE PAST. SO THAT WILL BE THE ONLY WAY TO GET THEM. FOREST IS CORRECT. BLACK HILLS AMMO TYPICALLY USES POWDER WITH FLASH RETARDENT. IT'S GOOD STUFF. THE OPS INC BRAKE IS NOT DESIGNED TO HIDE FLASH. BUT IT DOES, TO A DEGREE. IT IS A PATENTED MUZZLE BRAKE THAT ENHANCES THE ACCURACY OF THE WEAPON AND, WITH THE BARREL COLLAR, PROVIDES THE INTERFACE BETWEEN THE WEAPON AND THE ULTIMATE FLASH SUPPRESSOR, THE OPS INC 12TH MODEL CAN. Q3131A IS NOT SUITABLE FOR THIS PARTICULAR BARREL/CHAMBER COMBINATION. THE CHAMBER IN THIS PARTICULAR "REAL" SPR BARREL (MADE OF UNOBTANIUM) IS THE ONE SPECIFIED BY CRANE, AN A.M.U. MATCH CHAMBER. MATCH CHAMBERS ARE EXTREMELY TIGHT, MINIMUM TOLERANCE UNITS DESIGNED TO BE USED WITH MATCH AMMO HELD TO SIMILAR TOLERANCES. Q3131 HAS HISTORICALLY PROVEN TO BE ONLY A NOTCH ABOVE WOLF/NORINCO IMPORTED AMMO. THAT IT DOES NOT CHAMBER DOES NOT SURPRISE ME TOO VERY MUCH, NOR SHOULD IT CONCERN YOU. WHAT WOULD BE GAINED FROM LEARNING HOW MEDIOCRE (AT BEST) 55 GR AMMO SHOOTS IN A PRECISION WEAPON WITH A 1X7" (NOT 1X8") TWIST DESIGNED FOR HEAVIER BULLETS? PLEASE FORGIVE ME, BUT THIS REMINDS ME OF THE ANALOGY OF MIXING EXCREMENT WITH ICE CREAM. IT DOESN'T DO MUCH FOR THE PALATABILITY OF THE EXCREMENT, BUT IT REALLY MESSES UP THE ICE CREAM. I HOPE YOU'RE USING A GOOD BORE GUIDE WITH THAT BARREL. DO YOU NOT MIND THE RESULTS OF AN OPEN LEAD BASE BULLET BEING FIRED IN SUCH A BARREL? THAT PARTICULAR UPPER CAME THROUGH M.S.T.N. I KNOW FOR A FACT WHAT IT IS CAPABLE OF DOING WITH FEDERAL PREMIUM MATCH AMMO. SORRY, BUT I FIND IT DIFFICULT TO "CUT THE CORD" SOMETIMES. WES GRANT [URL]MSTN.BIZ[/URL] |
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Yes this was a MSTN built upper. The scope was sighted in but the cams were not set back so that zero indicated the actual zero. Only two rounds of Q3131A made it down the pipe. I was trying to get a rough zero and not waste match ammo since once the dials were set back to zero, the scope put the POI off the paper. All the rest of the ammo was Black Hills Match. I will be doing several types and weights of ammo to see what is the most accurate. Wes, You use Federal Match for testing to ensure its sub MOA? Do you use 69 grain normally or 77? |
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ACTUALLY, WE DID NOT BUILD THIS PARTICULAR UPPER, BUT WE HAVE BUILT SEVERAL JUST LIKE IT. IT IS THE "REAL THING", WITH A BARNETT-BUILT DOUGLAS BARREL. THIS PARTICULAR UPPER WAS THE BEST SHOOTER OF THE DOZEN BUILT, TOO. I TYPICALLY SHOOT: FEDERAL CMP MATCH 69 GR FEDERAL CMP MATCH 77 GR BLACK HILLS 75 GR - RECENT ADDITION SINCE THEY NO LONGER SELL THE 77 GR FEDERAL LOAD THROUGH THE CMP, I TRY TO RATION IT CAREFULLY. MOST SHOOTING IS DONE WITH THE 69 GR FEDERAL LOAD. IT WORKS WELL IN EVERYTHING IT SEEMS. BUT OCCASIONALLY, A BARREL, LIKE THE LMT MRP, SHOWS A PREFERENCE FOR THE 77 GR LOAD. ONE SPR SHOT BEST WITH THE BH 75 GR AMMO, TOO. HALF THE FUN IS FINDING THE BEST COMBINATION. BUT I ONLY SHOOT MATCH AMMO IN SPR UPPERS. WES GRANT [URL]MSTN.BIZ[/URL] |
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I have only seen one real SPR upper that beat mine - Raptor22's (holy hannah!). Of course, that one ALSO came from MSTN. No surprise there! [:D] Edited to say: My reference was confusing - I am proud to [s]gloat[/s] say that the SPR being shot here is mine and is the same one you see posted in my other pictures. |
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I e-maile seberger a week or two ago on getting the Ops break and collar and he gave me this line on the liability of selling these seperately on improperly contoured barrels. I wonder what the liability would be, The suppressor the customer cannot buy won't properly line up? Or does he at some point in the foreseable future plan to sell his products to civilians? |
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