Vltor A5 with BCM 11.5"

[MWT]

After reading Iraqgunz thread on the A5, and at least three other 10+ page A5 threads I have a few questions remaining which I hope to find the answers to. I'm picking up a BCM 11.5" pistol and will be SBRing it, so it's a great excuse to buy the Vltor A5 RE. For now, I will be running it unsuppressed.

Questions:

• Sprinco Green or stock Vltor spring? I read that the stock is smoother, while green is more reliable?
• H2, H3 or H4 buffer? (Iraqgunz used the A4 I think in his 11.5" BCM)
• Will the BCM Gunfighter stock engage the first position on the Vltor 6 position RE?

Requirements:

• It needs to cycle .223 reliably since I have a big stash and easier access
• it needs to function in cold temperatures and hot temperatures (should I just pick up an extra lighter buffer for winter?)

[bandw1dth]

Another choice for your action spring is the JP extra power ground and polished rifle length spring. I've been hearing reports that it's been working out swimmingly.


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[Hmac]

I use an A5 with VLTOR spring and buffer on three different rifles without any cycling issues, including my 11.5 BCM-barrelled SBR. .223 is almost all I shoot. IIRC, the SBR likes the A4 buffer.

The Gunfighter stock doesn't collapse all the way since the A5 buffer tube is longer.


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[MWT]

I use an A5 with VLTOR spring and buffer on three different rifles without any cycling issues, including my 11.5 BCM-barrelled SBR. .223 is almost all I shoot. IIRC, the SBR likes the A4 buffer.

The Gunfighter stock doesn't collapse all the way since the A5 buffer tube is longer.


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Thank you. I wonder if the H4 buffer will work in the cold, or should I step down to a H3?

I'm cool with the stock not collapsing all the way, I just want it to lock when it does collapse all the way. Would the 6position allow this?

[tb-av]

I'm cool with the stock not collapsing all the way, I just want it to lock when it does collapse all the way. Would the 6position allow this?

Yes, it locks and will be just about 3/4" back from face of castle nut.

[Hmac]

Thank you. I wonder if the H4 buffer will work in the cold, or should I step down to a H3?

I'm cool with the stock not collapsing all the way, I just want it to lock when it does collapse all the way. Would the 6position allow this?

I live in Minnesota, haven't ever noticed any cycling issues that are weather dependent.

Yeh, as TB-AV said, it's locks, just doesn't abut the castle nut.

[bandw1dth]

Has anyone tried taking the A5H0 ( 3.8oz ) for example, and replacing the solid weights inside with the same weight of tungsten powder aka spikes T2, T3? You'd have the dead reliably A5 system with a quiet buffer. I couldn't imagine any problems would arise as long as the same weight of tungsten powder replaces the solid buffers.

What are your thoughts fellas?


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[308sako]

FWIW:

I've run 4 different 11.5" BCM barrels on my SBR's and Find that my H3 buffer with a Tubb CS flat spring and an LMT enhanced CARRIER run very sweet with the AAC SPR-M4 attached. However, this is too much resistance when shooting lower powered .223 without the suppressor, and the rifle will short stroke.

[Slippers]

Has anyone tried taking the A5H0 ( 3.8oz ) for example, and replacing the solid weights inside with the same weight of tungsten powder aka spikes T2, T3? You'd have the dead reliably A5 system with a quiet buffer. I couldn't imagine any problems would arise as long as the same weight of tungsten powder replaces the solid buffers.

What are your thoughts fellas?


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Won't work. The weights are biased with a spring in the A5. Changing out for tungsten powder would defeat one of the main purposes of the A5.

[vicious_cb]

Has anyone tried taking the A5H0 ( 3.8oz ) for example, and replacing the solid weights inside with the same weight of tungsten powder aka spikes T2, T3? You'd have the dead reliably A5 system with a quiet buffer. I couldn't imagine any problems would arise as long as the same weight of tungsten powder replaces the solid buffers.

What are your thoughts fellas?


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Powdered metal buffers actually work worse than solid weights. Slow motion footage shows they exhibit more bolt bounce than their similarly weighted solid counter parts.