Will be going on a bushmaster M4 A3. As cheap as possible. And I would like to comfortably shoot it without hearing protection. Will this be possible?

The cheapest silencer will be the one which you will not have to upgrade or repair or replace in the future, or damage your hearing.

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Quoted: The cheapest silencer will be the one which you will not have to upgrade or repair or replace in the future, or damage your hearing.

suggestions?

I will suggest the YHM, only because of the price.

I think ADCO is carrying these:

Phantom 5.56

Price is right, and you can use the Phantom QD.

My suggestion is don't go as cheap as possible on any gun equipment you buy.

Go with the top three Advanced Armament, Yankee Hill, or Ops Inc. Find out who has the 5.56 set up you want and purchase it IF IT is stocked at that dealer. If you purchase from a dealer that has no stock you could wait for weeks, months, or yes a year. I have the AAC Omni but it is NOT the cheapest. It on the other hand is a great suppressor. Decide if you will ever put it on another firearm. When purchasing a Quick Disconnect (QD), you will need to buy additional mounting (flashhiders) for each gun. Omni is a QD without any additional hardware. Mounts on the original A2 birdcage. You can also get a threaded suppressor which will can save you a few dollars. The attachments usally will add $60 to $80 to the suppressor. Look up the manufacturers of suppressors and review their products BEFORE making any decision. This will save you time and money in the long run.
Enjoy your shooting

Quoted: My suggestion is don't go as cheap as possible on any gun equipment you buy.

Buy quality and only cry once.

Quoted: The cheapest silencer will be the one which you will not have to upgrade or repair or replace in the future, or damage your hearing.

Good advice.   I went cheap and shouldnt have.  I wish I'd have paid more up front

GemTech HALO.  It meets your criteria, yes you can safely shoot w/o hearing protection.

I second either the Halo or M4-02 from Gemtech.  Both are quality and affordable cans from a company that will still be in business in several years if you need service.

Quoted: Will be going on a bushmaster M4 A3. As cheap as possible. And I would like to comfortably shoot it without hearing protection. Will this be possible?

If you only have one gun, thread on's are generally cheaper. If you plan to get more and want something easily swappable, go with a QD now to prevent rebuying.

Either way, it still depends on where you shoot and what you consider "comfortably". In doors I find my M402 way too loud, outdoors it's fine.

Quoted: Quoted: My suggestion is don't go as cheap as possible on any gun equipment you buy. Buy quality and only cry once.

Amen to that!

I would suggest the OPS INC 15th model...  It will come with  very effective brake, that is nice when shooting without the can.    

Quoted: Will be going on a bushmaster M4 A3. As cheap as possible. And I would like to comfortably shoot it without hearing protection. Will this be possible?

Tac 16

I really like my Buckmark with 3-1/2 in barrel.