Ultra Match O-Ring Pack

Rated 5.00 out of 5 based on 61 customer ratings
(62 customer reviews)


SKU: Standard-O-Ring 5 Pack Category:


Tired of your thread protector working its way loose on your threaded barrel?

Our heat resistant viton O-ring helps to keep the thread protector tight while shooting or when concealed carrying with a threaded barrel.

Package contains:

5- Viton O-rings

Browse all of our Thread Protectors & O-Rings.

Additional information


9MM, .40 S&W

62 reviews for Ultra Match O-Ring Pack

  1. Rated 5 out of 5

    Troy C.

    Perfect for keeping the threaded barrel protector on my G22. Held up to about 150 rounds at the range without getting loose. Quick delivery, good product and a sense of humor. My kind of company.

  2. Rated 5 out of 5

    john n.

    I have to say I was worried about not fitting on my other barrel, but it worked just fine and it looks nice!

  3. Rated 5 out of 5

    Shawn H.

    Tight fit just like I like it!

  4. Rated 5 out of 5

    Irina M.

    Keep up with the good job. And in love with all your fucking comments and messages bitches!!! Just fuck me sideways more with deals and fucking sales

  5. Rated 5 out of 5

    Lucas M.

    i had been looking for o-rings for my CZ for the longest time and couldn’t find them anywhere. Thankfully Blacklist had some and once on my threaded barrel it really helped. My thread protector stayed snug even after 5 mags ran through it.

  6. Rated 5 out of 5

    Mark G.

    This item completes the barrel no barrel nut dancing of any kind. Small discreet not bulky and noticeable. Once again Blacklist 5*

  7. Rated 5 out of 5

    Alex J.

    Fucking Excellent

  8. Rated 5 out of 5

    Evan R.

    I have this on all of my threaded guns and it prevents the thread protector from unscrewing on its own.

  9. Rated 5 out of 5

    Gabriel R.

    I am a Wholesale Distributor Rep for one of the largest firearm wholesalers in the country and I have been very impressed by your order confirmation/tracking/email updates and hilarious humor in the messages. Keep it up, fam.

  10. Rated 5 out of 5

    John S.

    needed an o ring to keep the thread protector on a cz p07 from flying off into space. as the title indicates it did the trick

  11. Rated 5 out of 5

    Drexel R.

    I give them a five star because they were good quality and fucking awesome. Thanks, Trump!

  12. Rated 5 out of 5

    Stephen A.

    Only using one of Ultra Match O-Ring Pack, so far no problems to speak of at this time. Thanks

  13. Rated 5 out of 5

    Hank T.

    Works as described. Would buy again.

  14. Rated 5 out of 5

    Adam S.

    A Would definitely do business again

  15. Rated 5 out of 5

    Sergio S.

    These items are amazing! The finish is great, haven’t had a chance to fire it yet but can’t see anything going wrong, because the finish and material seem to be top notch!

  16. Rated 5 out of 5

    Chad B.

    Great place for hard to find item. Barrels are fantastic!

  17. Rated 5 out of 5

    BRIAN W.

    Ok, so 2nd order and everything went just as good as the first. Everything went great, easy to order, quick shipping and the products were great. I would upload a picture but waiting for my lower to be finished. Thinking about ordering, don’t wait! This is a great company to deal with, not to mention a quality product!

  18. Rated 5 out of 5

    Marcos A.

    FINALLY I founded a website like this place that had the rightful select size o rings for a threaded barrel they work outstanding they’re what they say resist extreme heat I literally ran 4 30rnd sticks straight through without letting it cool down my comp didn’t even came off moves a bit the ring didn’t melt it did what it was suppose to do I would definitely recommend this to anyone else

  19. Rated 5 out of 5

    Sam F.

    I bought a set of these O-Rings after installing a threaded barrel on my Glock 19, and found the thread protector to be pretty loose. I wanted something that would allow me to remove the thread protector at will with no tools, but would retain the protector with no worries during firing. After researching the options available, I found these. They have fulfilled the desired capacity entirely, and I have no qualms with them whatsoever. I’d highly recommend them.

  20. Rated 5 out of 5

    Jason Helper

    I have these on ever pistol and rifle I have, hundreds of rounds zero problem, keeps thread protectors on nice and snug, then switch to my surpressers and same results, no coming loose.

  21. Rated 5 out of 5

    Chad B.

    Does exactly what its intended to do..

  22. Rated 5 out of 5

    Maurice B.

    Came on time, works perfectly for my suppressed P10c.

  23. Rated 5 out of 5

    Dave W.

    50 rounds down range with no problems. Thread protector stayed on.

  24. Rated 5 out of 5

    Chris P.

    Excellent item and customer service was outstanding!!

  25. Rated 5 out of 5

    James M.

    Both my dad and I own a Blacklist barrel. Ran both perfect from the first rounds through them. They nor only run great they are works of art to be admired. We have the black and the stainless. Looking to add the gold/tin next.

  26. Rated 5 out of 5

    John W.

    Works great on my sig MK25. Thread protector stays where it should. Big improvement.

  27. Rated 5 out of 5

    Danny P.

    Fits my aftermarket glock 19 barrel threads well

  28. Rated 5 out of 5

    Andrew B.

    Fucking excellent

  29. Rated 5 out of 5

    Adam H.

    Loved shopping with these guys! Most hilarious shipping confirmation ever and I really enjoyed the updates. Great service, great product. Font hesitate. Buy it, pussy

  30. Rated 5 out of 5

    James N.

    Great service. Excellent product Works as expected

  31. Rated 5 out of 5

    Sean Y.

    I was kinda pissed to find that my barrel nor my thread protector didn’t cone with an o-ring… Thankfully Blacklist was there to provide a solution. Thank you Blacklist!

  32. Rated 5 out of 5

    Austin E.

    Works like it should, thanks for great pricing and quality

  33. Rated 5 out of 5

    Delano S.

    Orders o-rings. They came. They fit. Thread protector doesn’t move. Good job.

  34. Rated 5 out of 5

    Jeffrey H.

    High quality, perfect fit on my silencerco 9mm threaded barrel. Ultra fast shipping. Wonderful company.

  35. Rated 5 out of 5

    David H.

    These o-rings proved their worth right away – they seal and secure all accessories to my threaded barrels without requiring lock-tite! Greatly appreciated.

  36. Rated 5 out of 5

    Jason H.

    Better then most, these are thinner so no gaps on your surrpresser, keeps everything nice and tight..

  37. Rated 5 out of 5

    Jordan S.

    I installed one of these on a silencerco threaded barrel and after 300 rounds, the thread protector hadn’t budged. It’s a simple and inexpensive solution to an annoying problem.

  38. Rated 5 out of 5

    Jason Helper

    These are thinner and better quality then most I’ve seen. You can keep these on all the time for your thread protected and surrpresser, some rings are to thick for silencers

  39. Rated 5 out of 5

    Eric K.

    I recieved O-Rings, thank you. They have held up well so far.

  40. Rated 5 out of 5

    Michael T.

    I’ve ordered 2 TIN barrels so far and also ordered a ultra Mach O-ring pack. This company under promises and over delivers! Will do much more business in the future!

  41. Rated 5 out of 5

    Ricardo L.

    Item works great keeping the thread protector on my barrel. Doesn’t come lose at all thanks to these o rings.

  42. Rated 5 out of 5

    Jeremy L.

    item arrived early than expected, fast shippimg, will buy from again

  43. Rated 5 out of 5

    Steven A.

    I put these o-rings on a pair suppressor ready of CZ-P07’s. That’s right! Two of the same gun! In the past, even if I used tools to tighten down the thread protectors, after about 100 rounds or so the thread protectors would be loose. This seriously messed with accuracy and bullet impacts down range. I put these on, tightened ‘em down and no more loose thread protectors. My experience has been good and I’m completely satisfied. Your results may vary but to me, this is a genuinely good product.

  44. Rated 5 out of 5

    James G.

    It keeps my barrel nut on and they’re really affordable.

  45. Rated 5 out of 5

    Casey A.

    Works great, keeps my thread cap on my zev Barrel from getting loose and falling off while shooting

  46. Rated 5 out of 5

    Ancestral E.

    Fast shopping and a quality product

  47. Rated 5 out of 5

    Ryan K.

    Fast shipping. Fit great. Keeps my thread protector from backing off. Emails from Blacklist fucking hilarious!

  48. Rated 5 out of 5

    Royce C.

    A Quick delivery, top quality.

  49. Rated 5 out of 5

    Darrien C.

    Love your product wish you guys will make a comp for your threaded barrel in 40 sw soon

  50. Rated 5 out of 5

    Chris B.

    Best company I have bought glock products from

  51. Rated 5 out of 5

    George R.

    My overall experience was awesome I love the way they respond with her emails are hilarious I wish they had something else I could buy from them just to see what they come up with next LOL Thank You. George

  52. Rated 5 out of 5

    Donald W.

    I have an aac thread protector on a MP threaded barrel. These o-rings take help lock it on perfectly and the cut in the thread protector cover them perfectly. So the o ring is covered up and prevents it from backing off during fire. I definitely recommend these!!

  53. Rated 5 out of 5

    Coney S.

    Never received items.

  54. Rated 5 out of 5

    Wayne S.

    I haven’t purchase a suppressor YET, but these O-rings really seal the thread protectors onto the threaded barrels. I gave one to a friend, who refuses to tighten his thread protector with a tool, even covered with a cloth. He learned that while using the O-ring, he can hand tighten only and his protector stays on during on all day shoot at the range.

  55. Rated 5 out of 5

    Alex B.

    Bought a SilencerCo threaded barrel for my Glock. However, the thread protector kept coming undone. Bought these, and that completely fixed the issue. Would recommend.

  56. Rated 5 out of 5


    I basically just wanted to give a quick review and comment you guys on your hilarious emails and all your Communications even down to the little packing slip that comes with whatever you order is it’s funny too. The O-ring seem to be of good strength and precise size I’ll find out after using them how they hold up but I think that’ll work just fine.

  57. Rated 5 out of 5

    Ivan L.

    Super easy to install. Thread protector is no longer vibrating loose.

  58. Rated 5 out of 5

    Miguel I.

    Item works great, keeps the thread protector from backing out and getting lost.

  59. Rated 5 out of 5

    Joe J.

    I have blacklist barrels in three of my glocks. Have no complaints. Excellent quality at a fair price. Packaging is really nice as well.

  60. Rated 5 out of 5

    Kenneth D.

    Retains thread protector securely.

  61. Rated 5 out of 5

    Dalton P.

    You guys rock, it was great

  62. Rated 5 out of 5

    Thomas L.

    Just O rings that work and great price.

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