Check For Baffle Strikes with SureFire Bore Rods from Geissele

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Those who have never experienced a baffle strike typically never think about a baffle strike. Its a remote possibility that only happens on the internet. However, those who have experienced a baffle strike tend to take precautions to avoid them.

Seeing an opportunity for a fantastic niche product, SureFire (a manufacturer of suppressors) and Geissele has stepped up again with their new Bore Rods. The new rods are basically precision machined straight rods that are inserted through the bore to check for the proper alignment of a suppressor or muzzle device.

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To use, the rods are inserted into the barrel while the muzzle device is installed. If it is concentric, there will be equal spacing around the rod. If not concentric, it should be an easy visual check with the being offset.

Rods are available for most of the common centerfire bores including .223, 6.5, 6.8, 7.62, and .338. No word on other calibers. Retail for the rod is set at $79 each and before anyone has an infarction, Geissele has added the following:

”…our Rod is held to +\- .0001″ not just on the diameter, but also over the length of the rod. It is incredibly straight and difficult to make (It’s straight to +/- .0001″ over the length of the Rod!). Which is why it’s so expensive. A lathe would not be able to keep it that straight over the entire length of the 15″ Rod. Our Rod is Gage quality, not a run of the mill bar stock cut down.”

Being in the manufacturing side, truly straight drill rod is not cheap. The price is fair considering the processes used, at least in my opinion.



Nathan S.

One of TFB’s resident Jarheads, Nathan now works within the firearms industry. A consecutive Marine rifle and pistol expert, he enjoys local 3-gun, NFA, gunsmithing, MSR’s, & high-speed gear. Nathan has traveled to over 30 countries working with US DoD & foreign MoDs.

Nathan can be reached at Nathan.S@TheFirearmBlog.com

The above post is my opinion and does not reflect the views of any company or organization.


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  • Drew Coleman

    This is a tool meant for a shop or gunsmith to buy and use, or for someone with lots of guns and muzzle devices.

  • Joe

    In rod we trust.

  • Some Guy

    >Geissele product
    >doesn’t have “Super” in the name

    I dunno about this one.

  • C. Her

    “straight to +/- .0001″ over the length of the Rod”, do they mean Ø0.0001″ perpendicularity tolerance zone? “+/- .0001″ over the length of the Rod” isn’t impressive inregards to diameter but if they keep the axis of said diameters to +/- 0.0001″ that is AWESOME!

    • JumpIf NotZero

      A strong wind will bow that rod more than .0001″, so they must be talking about holding OD.

    • Bill

      Yeah perpendicular to within 0.0001″ over 15″ would be a feat. The perpendiularity is probably more important for what they are doing so it would be intetesting to know what it is. Unless they assume the baffles will keep the rod streight

    • CountryBoy

      “keep the axis of said diameters to +/- 0.0001″ that is AWESOME!”

      That’s why it’s $80.

  • Duray

    Why on earth would you demo this with the weapon fully assembled? All you need is a given upper, no bcg, etc. Then you’re not staring down the barrel of a fully functional rifle.

    • TheWarriorWorkshop

      Seriously dude? I think there’s a plastic bag floating down the street somewhere that needs to be picked up so a kid doesn’t suffocate himself…why don’t you go get on that

  • Dave Y

    Maybe these are significantly more precise. And, it’s 80 bucks vs. possibly 10X that for the suppressor.

    On the other hand, you can get a guide rod from CNC warrior for 15 bucks. They work too.
    They may not be at the same tolerance, and I’m not qualified to say how they rate or compare but I was a little surprised at 80 bucks.

    • JumpIf NotZero

      Pretty much this. I have enough of money for hobby purchases, mostly because I wouldn’t go around dropping $80 per caliber on steel rods.

      I want some of these, but I’m not at all interested in that price tag.

    • 6.5x55Swedish

      I think this is more for the gun smiths than the every day man.

    • AndyT

      My CNC warrior rod saved my 9mm can. I had to get the shoulder recut on my 9mm at barrel but now it’s perfect.

      Highly recommend them as well.

  • DanGoodShot

    I actually had a baffle strike before… it wasn’t on a can either. Believe it or not it was a yhm phantom muzzle brake. No b.s. Apparently there is a .25 inch space between the crown of the barrel and the first baffle of the brake. There are no port holes in that area. Hell, I didn’t know that space was there till this happened. Enough crap built up in that space(copper fouling, carbon, dirt…crap) to the point it started knocking the bullet off as it was leaving the crown and caused it to start hitting the next to baffles in the brake. How I found out was at the beginning of the day the gun was on point. Halfway through I couldn’t hit a barn. When I decided to look I saw that the last hole of the brake went from round to square. I removed the brake. Found the build up of “crap”, cleaned it and drilled out the first two holes. G2G! Weird crap could and does happen!

  • Harry’s Holsters

    A must if running a can on multiple AKs of various origin.

    • iksnilol

      Just use a 9.3 magnum suppressor, easier that way. Otherwise build your own AKs/buy quality AKs without bore concentricity issues.

  • Mack

    A cheap alternative that is probably 99% as good as these is drill rod from Mcmaster Carr. Just need to recut the ends and round and polish. for less then 10 dollars, they are damn straight and i have ever had a strike.

  • Swarf

    Has anyone mentioned McMaster-Carr yet?

    Jiminy crap that is a lot of money to pay for $5 worth of steel rod.

  • iksnilol

    Won’t they be easy to bend?

  • DGR

    1: This post has more information than the actual SureFire website, that is a foul.
    2: I appreciate the finer things in life, but why is this necessary? Is there even any data that shows why I need a 0.0001″ tolerance in a rod when most barrels aren’t even within that spec? Just to add this from the website of Shilen Rifles (who includes tolerance specs…) in the description for a Match Grade Barrel “In these barrels, the bore must measure within .0005″ of our standard diameter and the groove cannot vary in diameter more than .0003″ for the length of the barrel.” FYI, Shilen Select grade Match barrels hit 0.0001 tolerances on the bore, but only 0.0003 for the diameter.
    So lets recap. Your telling me, you want me to stick a 0.0001 tolerance metal rod into a barrel that doesn’t even meet that spec? Are these cans even built within that spec? Well id love to answer that question but since the SureFire website has almost no actual data on their products, I can’t.
    So I ask, what good is a bore rod that is held to higher specs than match grade barrels or the actual suppressor’s bore?
    P.S. If anyone has the tolerance for the suppressor bore, please correct me. But that spec is not listed on the Surefire website, so I can only assume that is for a reason…

    • JumpIf NotZero

      No the cans are no built to .0001. If they EDM the bore maybe, but no mount is, not even thread on.

      That’s not really the point tho. They’re explaining that the rod won’t be stacking more tolerance on.

      • DGR

        Public math here, so forgive me if I make a mistake. But if you have a 15″ .2810″ guide rod for a .300″ barrel bore (and lets assume you have a super match grade barrel that is within 0.0001″ to spec to start with), and you have a 8.4″ can (like the Surefire SOCOM II series, then you will have only 6.6″ of guide rod actually inserted into the barrel, which means that due to the tilt (if I’m using the term here) between the muzzle of the barrel and where the end of the guide rod ends, you have a tolerance of .0029″ or 0.0005″ per inch of barrel contact. So literally this 0.0001″ tolerance is absolutely useless on every level. Not to mention that this is a visual gauge and these kind of tolerances are indistinguishable to the naked eye.

        My point, companies need to stop selling products based on pointless specs. Tell me why the specs matter, and why they are worth me spending $79 on them. Because best I can tell a 0.0001″ tolerance is literally useless. I mean heck, how can I verify its tolerance ever again if that spec did mean anything? Are they going to sell me a $259 gauge to inspect tolerances of my $79 bore guide rod? Instead, why don’t they sell a $15-20 guide rod at a useable tolerance spec? Or better yet, maybe use a composite or brass because I’m sure as hell not putting a steel rod into the muzzle of my barrel to begin with.

  • hking

    They have been pricing things really weird lately. The tungsten weights for their new buffer and spring are $20 EACH. They are the same exact dimensions as normal weights and you can easily find them for $5-6 elsewhere.

    • JumpIf NotZero

      Fwiw… I have never seen tungsten weights for under $12 each.

    • Cayton Jones

      I misread that it was $80 for the set, and I still thought it was overpriced. $80 each is ridiculous.

  • uisconfruzed

    Thanks!

  • The_Automator

    Geissele has been selling these for years. Not exactly new.

  • TheWarriorWorkshop

    You know some idiots gonna forget to pull the rod out…

    • JumpIf NotZero

      Totally fine. Did you not see the article on flechettes?

  • JumpIf NotZero

    .2031″ for .223? .223 SAAMI is .219″

    Um… How did you select this exactly?!

    • Cayton Jones

      Sorry that it’s unclear. I’m not sure how close is so close that it doesn’t fit without a hammer. I thought .2031 would clear the barrel/muzzle device easy enough, without excessive contact. Similarly the .2810″ for .308 winchester.

      • Kenneth Giusto

        I bought the .2190 for .22/.223 and .3020 for .308 and both were a little too big. I placed another order for .2120 and .2950 and they are perfect. I cut the 3′ lengths in half and rounded one end to make sure they don’t gouge the bore. Even with the mistake I only have $34 invested and have 4 rods.

  • jon spencer

    Some people buy Starrett’s and some buy Fowler’s.
    Some want to check many times and be sure every time and some check one once.

  • kcshooter

    Or you can get an 8-12″ drill bit for like $15….

  • cawpin

    I bought the following for .22, .30 and .45. The .45 one I sized to fit in .452 pistol bores so it will lose a bit in .458 rifle bores. I have no qualms about these being straight enough.

    Also, there is no way they are holding straightness to 0.0001″ over 15″.

    8893K254 – Tight-Tolerance Rod, 0.4375″
    3′ Long, $8.91

    8893K187 – Tight-Tolerance Rod, 0.2031″
    3′ Long, $4.31

    8893K215 – Tight-Tolerance Rod, 0.2813″
    3′ Long, $5.19

    Total with shipping: $25.40