[HK SD9 Tactical]

I'm looking for the shortest flash hider. I'm leaning towards the P90 factory style. It seems like the 1/2x28 adapter + any short flash hider stick out pretty far. What do you guys recommend?

This would depend entirely on whether you want the option of a supressor or not. Make that decision, and the rest will follow.

 

[HK SD9 Tactical]

This would depend entirely on whether you want the option of a supressor or not. Make that decision, and the rest will follow.

I would probably never use a suppressor.

Then go with the P90 flash hider. There are aftermarker sellers that offer them.

P90 Factory Style Flash Hider

CMMG P90/PS90 factory style replacement flash hider. 12X1 Metric left hand thread.
SKU Number90-02
Price: $65.95

There are others that can be custom made but if I wanted to keep the SBR as close to looking like a P90 as possible, I would use the P90 FH. There are forum sponsors that also make aftermarket FH to put on the SBR.

I use an adaptor to go to 1/2X28TPI so that I can use my can on my SBR. It adds about 1/2" to the length of the barrel prior to the A2 FH being put on.

Here you can see it with the A2 adapter mounted.

 

[HK SD9 Tactical]

Updated picks.

With the can:

With the A2 FH (not tuned in this pick):

Invert of the Hi-DesertDog.com adaptor:

 

[HK SD9 Tactical]

I'm about to send my barrel off to hi-desert dog, but I have one more question. Does his 1/2x28 adapter option require the barrel to be cut differently from when he cuts the barrels with P90 threads? Or does that adapter screw onto P90 threads?

How does CMMG's P90 thread to 1/2x28 adapter compare to hi-desert dog's in terms of sticking out the furthest?

I'm now debating getting a suppressor in the future, and I don't want to get the barrel cut a certain way that is going to limit my options in the future. I'm looking for the best option that allow the shortest flash hider length and shortest suppressor length. (...by length I mean barrel profile/adapter length, not the length of the hider/suppressor itself)

Thanks, Mike

I am pretty sure that he will thread your barrel how you want. I suggest that you keep the original threading type on the barrel so that you can change to the P90 FH if you like in the future from whatever you choose today.

As far as sticking out, my adaptor only adds about 1/4" overall to the length of my SBR vs the P90 with its FH. I can not comment on the length of the CMMG one as I do not have one. Perhaps someone who does have one can answer your question. I suspect that they are around the same length though.

Decide IF you want a supressor. Once that decision is made, the rest will fall into place.

No supressor = P90 falsh hider, or other flash hider that you wish to place on the SBR. This can be a FH that is already set up to add a supressor later on IF you know what attachement the supressor will use. Your work is done for the time being.

Supressor = Lots and lots to think about: Supressor type, cost (around $600 to $900) for the setup, functionability, paperwork on both the federal and local level, federal tax of $200, cross use of supressor on other firearms, weight, length, type of attachment for supressor that can be used on both firearms, etc. etc, etc... It all comes down to what type of supressor you want and the mounting. Screw on, quick attachment - there are dozens of supressor companies out there that use their proprietary attachments.

If you want to have a PS90 SBR that in the 'future' can be upgraded to add a supressor, stay with the P90 FH and swap it out later with the proper adaptor when you decide to go with the supressor. The cost of a new FH adaptor for the SBR is minimal, ~$65.00 - $100.