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Depends on what parts you have on hand. IIRC, the Blackout doesn't require the gas regulator and block and the piston guide parts, but that depends on what Templar Precision requires for a Blackout Conversion nowadays.
 

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I'm going to have to base my decision on the availability of parts and on your decision regarding your build.
1) Do you plan on changing barrels? If not, then going with Templar Precision's non-QD trunnion is a must for the weight savings. This also plays into the next question on parts.
2) What parts does a Blackout build require? Ask Templar Precision and post the answer here. Hopefully the minimum requirements are a piston and barrel, which is doable.
3) How's your situation with ammo? You could base your build on what's available to you, but if both are equally available then you have to consider other factors.
4) Will you suppress or not? Going with a subsonic Blackout build makes the most sense here if you are.
 

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What are you going to use for a handguard with a 7” barrel? Custom made? I believe that muzzle would be tucked in the factory handguards pretty deep. The 9” PDW barrel barely gets the flash hider out.
 

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Back in the day there were a few 9" RemDef 5.56 PDW barrels floating around, and in my humble opinion, these really made the ACR shine. If you can find one, I'd highly recommend it. The up front weight that people complain about with the ACR really made the rifle super stable in this extra short configuration.
 

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Discussion Starter · #9 ·
Back in the day there were a few 9" RemDef 5.56 PDW barrels floating around, and in my humble opinion, these really made the ACR shine. If you can find one, I'd highly recommend it. The up front weight that people complain about with the ACR really made the rifle super stable in this extra short configuration.
Yeah. I see what your saying. I just got into the ACR game from ar and someone was talking to me about barrel compatibility. Thanks.
 

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Yeah. I see what your saying. I just got into the ACR game from ar and someone was talking to me about barrel compatibility. Thanks.
You misunderstand me (I think) my friend. These are ACR barrels, and they were made for the RemDef side of the business. Full piston, op rod, barrel nut wrench, etc. They came with the OG AAC non-suppressor compatible flash hiders too. Maybe Dana from Templar can help you out....
 

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Discussion Starter · #11 ·
Yeah. I see what your saying. I just got into the ACR game from ar and someone was talking to me about barrel compatibility. Thanks.
You misunderstand me (I think) my friend. These are ACR barrels, and they were made for the RemDef side of the business. Full piston, op rod, barrel nut wrench, etc. They came with the OG AAC non-suppressor compatible flash hiders too. Maybe Dana from Templar can help you out....
I’m sorry. I realized that I quoted the wrong message. Apologies. I meant to quote the one right above yours. I’m hunting for one of the 9”
 

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I'm going to have to base my decision on the availability of parts and on your decision regarding your build.
1) Do you plan on changing barrels? If not, then going with Templar Precision's non-QD trunnion is a must for the weight savings. This also plays into the next question on parts.
2) What parts does a Blackout build require? Ask Templar Precision and post the answer here. Hopefully the minimum requirements are a piston and barrel, which is doable.
3) How's your situation with ammo? You could base your build on what's available to you, but if both are equally available then you have to consider other factors.
4) Will you suppress or not? Going with a subsonic Blackout build makes the most sense here if you are.
Hey so if I have a 14inch barrel and a 10.5 inch barrel without op-rod or spring. Could Dana from Templar take both the barrels and convert the 14inch op rod and spring to the 10.5 inch?
 

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I'm not gonna blow smoke up his ass but he can work magic. Just depends if he's got time (y)
oh ok thank god time isn't a issue here, I bought a 10.5 inch without op-rod or spring to make a pistol/PDW build and now sweating because the gas systems aren't the same length.... hahaha

ps. I want templar's precision, but could my local gun smith get this job done? shorten the rod and I assume the spring is the same??
 

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It's not a simple chop of the rod, there's some recontouring as well. The spring is the same as far as I can tell.

Do you have the gas regulator? The piston rod, spring, gas regulator, and the lock ring handle are usually stripped from most barrel assemblies out there.
 

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I
It's not a simple chop of the rod, there's some recontouring as well. The spring is the same as far as I can tell.

Do you have the gas regulator? The piston rod, spring, gas regulator, and the lock ring handle are usually stripped from most barrel assemblies out there.
haha I actually have all the opposite, I don't have the piston rod, spring. It came with the factory gas regulator without the "cap" unfortunately (which I'm sure I can take from my 14 inch barrel). Let me post a picture of the barrel I bought, and maybe you can guide me in getting the right parts?

ps.
so I currently have a 14inch on my ACR and this barrel without rod or spring...

Could my local gun-smith get this done? the 14inch to 10.5inch rod and spring swap?

Bicycle part Auto part Nickel Tool Metal
 

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You're also missing the piston guide, which fits in that narrow stepdown next to the lock ring at the base. Without that your piston spring has nothing to act against.

Your local gunsmith might be able to do the machining, but unless they're very familiar with the ACR they'll be at a disadvantage because they'll have no idea what measurements to adhere to when cutting and recontouring the piston rod.

You're better off trying to source a piston rod that's already cut, or better yet a factory carbine length.

You might also want to start a new thread instead of hijacking Grumpy's.
 

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You're also missing the piston guide, which fits in that narrow stepdown next to the lock ring at the base. Without that your piston spring has nothing to act against.

Your local gunsmith might be able to do the machining, but unless they're very familiar with the ACR they'll be at a disadvantage because they'll have no idea what measurements to adhere to when cutting and recontouring the piston rod.

You're better off trying to source a piston rod that's already cut, or better yet a factory carbine length.

You might also want to start a new thread instead of hijacking Grumpy's.
Ahh I see, I'm not sure how frequently they show up here? do you know any other place/maker of these parts anymore other than templar ofc :ROFLMAO:

I will keep my eye out though.... I have already emailed templar about the 14->10.5 conversion, so hopefully when he is free I can get something done while I search for the factory op-rod and spring. The piston guide can be taken from the 14inch right? seems like it would fit. I will have take my 14 barrel out and check to see if the piston guide is a perfect fit or not...

Thanks for the info....
 

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The gas system from the 14.5" barrel can be transplanted to a 10.5" with the only exception being the midlength piston.

I have one of Templar Precision's cut down pistons that I'll probably off-load in December if you want to go that route. I thought about using it as a potential 300BLK project, but I don't have the lock ring assembly to make it work.
 

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The gas system from the 14.5" barrel can be transplanted to a 10.5" with the only exception being the midlength piston.

I have one of Templar Precision's cut down pistons that I'll probably off-load in December if you want to go that route. I thought about using it as a potential 300BLK project, but I don't have the lock ring assembly to make it work.
oh man yeah sign me up...

but you are right, main issue seems to be the piston from eye ball measure, let me know when you decide to sell yours I would love to have templar precision part in my ACR. This is my first non DI AR platform :ROFLMAO:

Thanks,
 
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