CFWa Bolt Spring Help

[komodoj]

I posted this in a previous thread but I think it got overlooked. Any of you great UT members have a “A” bolt that you use in a M11/9 know what color spring and coils? What I’m inquiring about below. Bought it used second hand and I don’t know if the spring is correct or not. Thank you.

Does anyone know the Spring coil number? I believe when these were shipped they were projected in the range of 640-690 rpm? I don’t know if this bolt still has the right spring or the right coil count. I disassembled it and counted 108 coils and a thickness of the spring at .037”. Thank you in advance.

 

[Battering ram NIB]

Call Tom

He will sell your the correct spring. Go to the source!!

 

[komodoj]

Call Tom

He will sell your the correct spring. Go to the source!!

Not looking to buy! Just trying to get some info on what I have. But ty for the advice! Maybe Tom will chime in here?

 

[TheColtCollector]

Full spring for the A bolt in the m11/9. Either kind of spring doesn’t really change it that much til you start clipping it

 

[tlrgsxr]

I wish someone would just post a consolidated list of spring types (plain vs orange vs orange is the new plain) and lengths for the different hosts and calibers (M11 vs A1 and .380 vs 9mm).

 

[Gaujo]

Wait so you have a CFW-A bolt that you're using an an 11/9. First quesiton is is it on an 11/9 size recoil rod? If it is you could likely assume it was set up correctly, but if not yea you're going to have to talk to Tom or get someone with the a bolt in an 11/9 to count for you.

Actually in typing that out I remembered I purchased an extra 11/9 guide rod + spring setup from Tom with my CFW-A bolt gen1 that I can count. (off to the garage)

I count 107 coils and there is no color on the spring. 12" long, .039in spring diameter. Now that one has never been mounted so take that with a grain of salt.

 

[komodoj]

Wait so you have a CFW-A bolt that you're using an an 11/9. First quesiton is is it on an 11/9 size recoil rod? If it is you could likely assume it was set up correctly, but if not yea you're going to have to talk to Tom or get someone with the a bolt in an 11/9 to count for you.

Actually in typing that out I remembered I purchased an extra 11/9 guide rod + spring setup from Tom with my CFW-A bolt gen1 that I can count. (off to the garage)

I count 107 coils and there is no color on the spring.

I get the same. 107/108. What about thickness? I get .037”. Length of 10.5” Thank you sir ! And yes it’s on a m11/9 recoil rod setup. Wow we are all over the place. Mine is also not clipped.

 

[Hey...]

Odd because my m11/9 A bolt has no orange. It’s factory .040” coil thickness, 86 coils, 9 5/8” length firing at 852rpm with suppressor. It wouldn’t function at full length (new spring).

 

[komodoj]

I wish someone would just post a consolidated list of spring types (plain vs orange vs orange is the new plain) and lengths for the different hosts and calibers (M11 vs A1 and .380 vs 9mm).

Yes I totally agree!! For as many of these bolts and there variations that have been sold, many have been resold sometimes including alterations to the springs that it would be very helpful to have a standardized “posting” of what should be with what and it’s expected ROF?

 

[strobro32]

Tom painted the ends of several springs to identify them during the testing phase of the A bolt. Once testing was complete and the A bolts started shipping, Tom only used one spring, the "orange" spring. The springs were no longer painted after that.

Every spring that has shipped (on the A bolt) is the "orange" spring.

 

[komodoj]

Tom painted the ends of several springs to identify them during the testing phase. Once testing was complete and the units started shipping, Tom only used one spring, the "orange" spring. The springs were no longer painted after that.

Every spring that has shipped is the "orange" spring.

Well that solves the “color”. Thank you.

 

[tlrgsxr]

Every spring that has shipped is the "orange" spring.

My first bolt came with an unpainted spring and a separate orange spring that could also be used. So, there’s been at least 2 that have shipped during production.

 

[strobro32]

That means you have two "orange "springs but one is painted orange.

 

[Gaujo]

Orange you glad you understand now? Now have you shot it yet?

 

[Vegas SMG]

Tom painted the ends of several springs to identify them during the testing phase. Once testing was complete and the units started shipping, Tom only used one spring, the "orange" spring. The springs were no longer painted after that.

Every spring that has shipped is the "orange" spring.

With the A bolt, you’re absolutely correct.

From the beginning, recoil springs for every M–11/9mm W bolt ever produced used the “silver” springs sourced from MPA. shortly after the first 100 bolts sold, I had just over 400 recoil springs custom wound, but they didn’t work correctly with the M-11/9 W bolt and no bolts were ever shipped with this spring. Wonder springs... I wondered what I was going to do with a box full of them.

Perseverance and a little luck led me to the “orange springs’ and initially I sold them as an optional Super Slow, (SS) spring for use in the M-11/9 W bolt. During development of the A bolt, the “orange spring” was used and proved to be very capable performers. Consequently, every A bolt ever produced, no matter the configuration, has shipped with this spring. This is not an OEM style recoil spring and while it may be possible to use with an OEM Cobray style bolt, I would recommend against it for this application. I’d imagine the recoil impulse to the rear of the receiver would be quite harsh and possibly compromise the rear receiver welds.

A couple of forum members have stated they’ve been able to get the A bolt to run reliably with .380 ammo in the large magwell M11-A1 using the wonder spring. I have not tested this combination and don’t ship assembled A bolts or support this configuration’s use. I simply don’t have enough first hand data about the purported reliability to ship these without my own testing. I will offer the spring independently, but you’re 100% on your own.

Only later generation A bolts will run reliably with .380 ammo or are 100% reliable with an M-11/9.
Generations are designated by the font size/type.
I don’t count total coils, never have.
Most of the information being requested is already posted here in the forums or on the Vegas SMG FaceBook page including ROF numbers.
Actual sellers of used products should be the ones answering questions about their goods.

 

[komodoj]

Thank you Tom for your reply. So if I understand this correctly, do not use a standard M11/9 recoil spring in conjunction with the “A” bolt( as some members said to do). Only use the “Orange” spring for best results and no weld issues in all the “A” bolts( even though now not painted) and purchase them threw you. Looking back threw all the data the recommendations are as follows

M11a1/ M11 (380acp) = 63-65 coils Orange spring
M11a1= 90 coils Orange Spring
M11/9=? Full length Orange Spring( can’t find this but took a guess)

Thank you in advance. Thank you Tom for bringing the A bolt to fruition!

 

[strobro32]

A bolt in a M11A1 380acp = 63-65 coils spring
A bolt in a M11A1 9mm = 90 coils spring
A bolt in a M11/9 9mm = full length spring. Length or coil count unknown unless more members want to submit them. So far, only Gaujo said 107.

We need to stop calling it the "orange" spring because they are not painted anymore so there is no way to know unless Tom shipped it to you. If in doubt about the spring, cut it long and test it. It's easy to remove coils, more difficult to add them.

 

[tlrgsxr]

That means you have two "orange "springs but one is painted orange.

As Tom confirmed, no it doesn’t.

 

[Mackjack]

If we want to purchase additional springs to experiment where would we purchase these from? Or would we just purchase OEM springs and start cutting coils to achieve desired outcome?

Thanks guys!

 

[Walksalone]

So Vegas where do we stand on the cfw 45 bolt? Just a joke I know the answer. Not happening!! Never!! Nota!

Just thought I would get that out there.