Why not pin/weld suppressor adapter

[parkerdude]

I'd like to build a 300blk upper and have a suppressor adapter permanently attached and pinned per Federal Regulations to create a barrel at around 16.25" - 16.50".

I'm leaning toward a YHM Phantom .308 suppressor w/QD adapter.

Adco does work like this, and I'm sure there are others.

I contacted Yankee Hill Machine via e-mail and asked if this permanent mounting of the suppressor adapter would void the warranty on the suppressor. The answer was no, it wouldn't void the suppressor warranty, but would void the adapter warranty.

It was stated that there is a "compression washer" between the barrel and the adapter that could no longer be removed for service, as is expected under the adapter warranty, and would void the adapter warranty.

Not to sound stupid but, so what? What does the "crush washer" do but adjust the indexing of the adapter? If the adapter is fitted and pinned, it's alignment won't change.

I know that everything behind the adapter is trapped and can't be removed or replaced without destroying the adapter.

OK, unless something is damaged or I decide to SBR the gun, what's the difference?

I don't really need an SBR, or the additional time, and cost at this time.

Does anyone know why I shouldn't do this build with a permanently attached adapter?

 

[crawfobj]

Don't see any reason why you can't do this. This is no diffferent than an AR barrel that has a 5" flash suppressor on it to get it to be over 16".

I'd look at what it takes to make darn sure it's "permanently" attached, and I'd make sure that at no time during the conversion does it even momentarily become an SBR (i.e. your temporarily short barrel is not installed).

 

[loki.fish]

Why not send in the SBR paperwork and use a 16" barrel until it comes back so you can get the shorter barrel?

Truthfully, if you want a shorter barrel, just SBR it and get it over with. I think this idea of a shorter barrel with a permanently attached FH, adapter, etc is silly if you can legally have a SBR.

ETA: I'm using a 16" barrel until my SBR paperwork comes through, that's why I asked.

 

[rjrivero]

I don't see any advantage to taking 1" off the barrel and pinning an adapter when you want to slap a can on it anyway. The can is going to add length so whats another inch?

Go short, or go 16. That's my humble opinion.

 

[crazy-mp]

Sbr it!!!

 

[dprice3844444]

crazy,he's trying to avoid the second 200 stamp.

 

[parkerdude]

I don't see any advantage to taking 1" off the barrel and pinning an adapter when you want to slap a can on it anyway. The can is going to add length so whats another inch?

Go short, or go 16. That's my humble opinion.

rjrivero,
I got the idea of a permanent, pinned way of making the barrel 16" minimum from you. It looks like the YHM adapter is closer to 2" longer than the barrel.

Like dprice3844444 said, I'm trying to save the additional $200 tax stamp! I don't care about an SBR enough to spend the bucks. This is a man toy, that's for entertainment only.

My wife is still going to want to show me how to use it when she finds out I'll have +/- $1500 in it. And NO I'M NOT P/WHIPPED

If we were talking about our Johnson's, an inch or two would be spoken of in different terms.

2" can mean the world!

 

[jmorris]

Sounds like too much work for an inch. I have welded the cans to the barrel so they come out @ 16" oal to save an extra stamp.but we are taliking about saving 8" +- at that point.

 

[Ludasmith]

Have you ever played with an SBR'd AR? Like an 11.5"? It was worth every penny to do mine.

 

[Owen Sparks]

Don't you have to take it off to clean it properly?

Besides, with a 300 Blackout expanding bullets fired out of a barel shorter than 16 inches probably would not preform as velocity is too low.

 

[zignal_zero]

I have no idea what kind of effect the missing barrel lenght will have on velocity, but I can tell you this -

5 years from now when yer can is permanently attached to your rifle, you'll think it'd be nice if you could take it off. Whereas if you just pay for the extra stamp, 5 years from now you wont be thinking "wow, I wish I had that 200 bux" just sayin

 

[jmorris]

Have you ever played with an SBR'd AR? Like an 11.5"? It was worth every penny to do mine.

I have SBR AR's but if you take a 11.5" barrel and pin/weld a flash hider to make it 16" oal what exactly did you gain? Why take the hit in velocity for nothing.

If your cutting the barrel short for a shorter rifle overall, it would be counter productive to then weld anything back on it to make it longer. If you want the can to be removed you need two stamps for that.

If you are fine with 16" oal on the barrel you need to weld the can itself to the barrel so everything comes out to 16". Then you only need one stamp.

 

[parkerdude]

Thanks for the input everyone. I think that some of the replies miss my point.

I don't want to SBR the gun, so I don't see any reason, at this time to spend the extra $200.

I was talking about shortening the barrel the amount that the suppressor Q/D mount extends past the mounting threads. Then having the Q/D adapter pinned and welded to the barrel to make the barrel assembly 16"+ .

I wasn't talking about welding the suppressor to the barrel, just the Q/D adapter.

I plan on shooting this barrel with and without the suppressor. I might even loan it to friends, (without the suppressor).

This will be my first suppressed gun, I still shoot everything else with shooting muffs / ear plugs.

jmorris -

my point was that I wasn't SBRing the gun. I want the barrel to be minimum legal length. My thought was that for a few dollars I could keep the barrel as short overall as possible, without requiring a tax stamp. Like loaning it to friends.

I know that I could just leave the barrel 16+ inches and be done with it, but where's the fun in that.

 

[rjrivero]

Then go for it! The 14.5" barrels have perm attached muzzle devices to make the legal 16" length requirement. You can do the same for any muzzle device that serves as an attachment point for the suppressor. No problem. The drawbacks are that you void the warranty for the muzzle device and you lock in your gas block and barrel nut. If you have already decided which muzzle gas block you are going to use and which hand guard you are going to use, then go for it!

 

[loki.fish]

We understood what you're saying, and we're giving you our opinion on why not to do it.

It's silly, leave it at 16" or don't be cheap and SBR it.

That is why I think you should not pin/weld suppressor adaptor.

 

[greyling22]

Parker, if you've got a 14.5" barrel with a 1.5 flash hider per attached on it, then yes, pop that sucker off and perm attach the suppressor adapter, you're absolutely right to want to do so. if you have a 16" barrel it doesn't make sense to whack it, rethread it, etc for just an inch and a half.

 

[rjrivero]

rjrivero,
I got the idea of a permanent, pinned way of making the barrel 16" minimum from you.

I assume you're talking about the perm attached muzzle device for the 9mm AR we built?

That's a different idea. The thought here was to make a pseudo-SBR so when you put the suppressor on it the OAL doesn't "grow" to 22-24".

Using a perm attached muzzle device to bring the length out to 16", and then adding the suppressor saves about 7-8" of "barrel length."

I would understand wanting to do something similar for .223 with a quick detach muzzle device buried under the tubular muzzle device to save some 7-8" but to do so for a 2" "savings" doesn't seem worth the hassle. (If Michigan allowed SBR's then this would never have gotten built. It cost more for the work on the barrel than it would have for the tax stamp.)

 

[jmorris]

Parker, if you've got a 14.5" barrel with a 1.5 flash hider per attached on it, then yes, pop that sucker off and perm attach the suppressor adapter, you're absolutely right to want to do so. if you have a 16" barrel it doesn't make sense to whack it, rethread it, etc for just an inch and a half.

That was what I was trying to say. If you have to pay someone to break it down and do the work, you will be money ahead (or very close) to SBR it. If you want to give folks a rifle of yours to play with that is a different story. However still not worth it for an inch from a money standpoint.

 

[parkerdude]

Thanks Guys,

That cleared my head right up. I didn't know how to ask the questions to get these answers, but I understand things now.