Differences btwn BCM A5 RE and the original VLTOR A5 RE?

[tom12.7]

Yes, the Colt ones. 17-7, .12x" wire diameter, active coil count, etc…

[Iraqgunz]

No, because the patent applies to the buffer only as I recall. Which is why Magpul and BCM are both able to make them.

@ABNAK

Just different enough to avoid patent infringements?

[Iraqgunz]

The buffer in both is made by Vltor. The only thing BCM is making is the receiver extension.

@M4Fundi

Can’t find a VLTOR A5 RE and stumbled onto the BCM A5 RE and was excited if it was the same thing, just manufactured by BCM… but… its not the same thing and I’m not sure what the reasons are…

VLTOR A5H2 buffer weighing 5.3oz and rifle spring, seven position receiver extension

vs.

BCM® Intermediate Receiver Extension Tube
Vltor A5H0 Buffer (3.8oz)

As I understand it the differences are

the VLTOR is 7 position, and a VLTOR H2 (5.3oz) Buffer

The BCM is 8 position, and a VLTOR H0 (3.8oz)

So, are these similar, but different and why?

[tanktop]

@scooter22

Anyone’s VLTOR (not BCM) RE + Sprinco Green sound super gritty?

Using a JP rifle spring and its silent and smooth, zero twang.

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[RobertTheTexan]

@tom12.7

Yes, the Colt ones. 17-7, .12x" wire diameter, active coil count, etc…

Tom do you have a line or lead on these sir?

ETA: I have exhausted my Google-Fu. But I have come up short.

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[MistWolf]

http://www.specializedarmament.com/—-buttstock-fixed-·-rifle/action-spring-rifle/

[tom12.7]

If those are actual Colt QC/QA items, then yes those should be fine. I source items a different way though. Unfortunately mil spec doesn’t necessarily align to that, even though those can or could be.

[twm134]

According to Brownell’s techs this is the colt rifle spring:

http://www.brownells.com/rifle-parts/receiver-parts/recoil-parts/recoil-springs/ar15a4-action-spring-prod4858.aspx?avs|Make~~Model_1=Colt__M16

[tom12.7]

It is very possible that the above is correct, I wouldn’t know their channels. It is very possible that a mil spec spring is suggested as a Colt substitute without meeting certain criteria.