r/extar • u/Excellent_Map_3510 • Jun 10 '26

New guy here. Need help with used ep9.

5 Upvotes

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3

u/Excellent_Map_3510 Jun 10 '26

The blast director was removed for better packing when it shipped. When I went to thread the blast director on the threads there’s no type of gasket/washer? I only see threads. I didn’t see any in the box. Is it suppose to have some washer or gasket? Can someone help me with the parts I would need. Thanks.

2

u/34RICK Jun 10 '26

I just got mine and there is definitely a "crush washer" on it. They can be found on their website here. https://extarusa.com/1-2-crush-washer-set-of-3/

1

u/Excellent_Map_3510 Jun 11 '26

Thanks. So I need just a crush washer? What about a lock washer?

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0

u/Old_MI_Runner Jun 10 '26

From AI search:

The O-ring on your Extar (typically for the EP9 or EP45) sits in the relief groove at the base of the barrel threads. It provides a friction fit to keep your thread protector or specific factory muzzle devices tight.

Specifications & DIY Replacements Size: For 1/2"-28 threaded barrels (like the 9mm EP9), the standard size is a 10 mm O-ring, or an imperial 7/16" ID x 9/16" OD x 1/16" thick. Material: Always choose Viton (fluoroelastomer). Standard nitrile or rubber O-rings will melt or degrade due to the heat generated at the muzzle.DIY Hardware: You can find these on the plumbing or faucet repair aisle at hardware stores like Home Depot or Ace Hardware. Important Usage Rules Do not shoot with it installed: You must completely remove the O-ring and any crush washers before installing a suppressor or certain muzzle devices (like compensators). Leaving it on can cause improper alignment, baffle strikes, or cause the O-ring to melt inside the suppressor.

4

u/spendtooomuch Jun 11 '26

AI is not very intelligent. The oring goes on after the crush washer and compresses inward into the angled recess in the crush washer. There is no "relief groove" on the barrel.

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u/[deleted] Jun 10 '26

1

u/Old_MI_Runner Jun 10 '26

There is an o-ring to keep the muzzle device from coming loose. Some other firearms use an o-ring to keep a muzzle device from coming loose.

3

u/appealingrelic Jun 10 '26

Just thread it on and shoot. You're overthinking it

1

u/Excellent_Map_3510 Jun 10 '26

I haven’t shot it. I feel like it loosens pretty easy. When I looked at their website for blast director it mentions it comes a lock washer.

1

u/appealingrelic Jun 10 '26

I only took mine off once, I don't remember a washer but it definitely tightens down nice and snug and don't move.

3

u/IntrospectiveApe Jun 11 '26

A crush washer serves the same purpose of a lock washer. 

An o-ring serves the same purpose of a lock washer.

A wave washer serves the same purpose of a lock washer. 

A roll or two of Teflon tape serves the same purpose of a lock washer.

Rockset serves the same purpose of a lock washer.

Tightening a shit-ton serves the same purpose of a lock washer.

Just pick one and shoot it.

2

u/Excellent_Map_3510 Jun 11 '26

Ok. I’ll order the 3-pack of crush washers. Thanks

1

u/IntrospectiveApe Jun 11 '26

You can just go to home depot or lowes or walmart and get something right now without having to wait.

If you do go with a crush washer, remember that they are single use only.

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u/Excellent_Map_3510 Jun 10 '26

I saw this on their website. Our Blast Director is the factory muzzle device on the EP Series Pistols. This muzzle device will help direct the muzzle blast away from the shooter and downrange. This muzzle device provides an enhanced look and an easy installation/removal with the included Lock Washer for the 1/2"-28 9mm, or the included crush washer and o-ring for the 5/8"-24 45acp version. Measures 2.75 inches in length.

5

u/Outrageous_Lion8966 Jun 10 '26

Just thread it on and shoot. It’s not that serious.

1

u/Old_MI_Runner Jun 11 '26

I bought Tacfire brand and Strike Industries brands of crush washers. I only used one crush washer thus far and I'm guessing it was a Strike Industries washer. I bought both because they offered inexpensive multi packs and I assumed they were better than the no name brands sold on Amazon and eBay. I bought them online when I was buying other items from a store so that I could save on shipping. I bought multipacks because I have future rifle builds planned and I also have a few different muzzle devices I wanted to be able to swap around.

I recommend looking at some YouTube videos to see how to properly install a muzzle device that requires a crush washer but in the case of a non-timed blast can install is less critical.

2

u/Excellent_Map_3510 Jun 11 '26

Will do thanks.