[ARCHIVED THREAD] - JP Enterprises Captured buffer spring issues

Posted: 8/3/2012 4:30:22 AM EDT

I have two JP Enterprise captured buffer spring assemblies.
One in a 16 inch build and another in a 10.5 pistol build. Neither will lock open after the last shot with the JP units.
No issues with standard spring and Spikes ST-T2 buffers.

Anyone else experience this ? Will shooting it more break it in so to speak and allow the bolt to start locking back?
I can pull the bolt to the rear and it will lock back manually on an empty mag just not after the last shot.
No issues with feeding or ejecting.

Posted: 8/3/2012 7:29:28 AM EDT

[#1]

What ammo?

Posted: 8/3/2012 7:36:51 AM EDT

[#2]

Privi M855, Fed bulk 55gr .223, IMI M855

Posted: 8/3/2012 7:42:48 AM EDT

[#3]

I'd call them up. I believe some were shipped with the wrong spring installed.

Posted: 8/3/2012 7:47:01 AM EDT

[#4]

Yep. I'd ask them. It should lock back...

Posted: 8/4/2012 8:35:59 AM EDT

[#5]

Called numerous times yesterday, continuous busy signal.

I'll try again Monday.

Posted: 8/6/2012 5:38:16 PM EDT

[#6]

Well I finally talked to JP Enterprises today.
I was told if the problem persists that they now have a "spring kit" for tuning the captured buffer.
It should be available in a couple of weeks.

[ARCHIVED THREAD] - JP Enterprises Captured buffer spring issues

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[ARCHIVED THREAD] - JP Enterprises Captured buffer spring issues

[ARCHIVED THREAD] - JP Enterprises Captured buffer spring issues