Topic: JP Silent Captured Action Spring (Buffer Spring/Buffer) (Read 885 times)

moagm316 · « **on:** January 24, 2012, 10:34:38 AM »

Quote from. http://www.jprifles.com/1.4.7.2_os.php

"One of my pet peeves is the sound of a wood rasp coming from my rifle. I find it totally intolerable, even though it is the normal sound of rifles from every other manufacturer. Over the years, we have spent a great deal of time hand prepping our action springs and extension tubes to get that near-silent, glass-smooth feel to our actions. Anyone who owns a JP rifle knows exactly what I mean since it's the most pronounced and immediately noticeable difference the first time someone handles and cycles one of our rifles; the operating system honestly feels like it's running on roller bearings. It's this obsession that we've taken to its natural conclusion after a couple years of thought, design, prototyping and testing our JP Silent Captured Springs (pat. pend.).

The best way to describe the results of this innovative system is the complete absence of mechanical feedback from the operating system under live fire and a smooth, silent feel to the rifle when you charge or manually cycle it. No rough, raspy sound or feel. No twang or vibration from the spring during live fire, just the beautiful sound of silence. Even in a very rough extension tube, the rifle runs smooth since the spring never contacts the tube, running instead on a guide rod similar to a 1911 guide rod system.

If you've followed the history of ARs, you probably remember the craze for pneumatic AR-15 action systems several years ago. Those pneumatic systems also made for a silent, smooth running rifle, but they had some fatal flaws that the new JPSCS effectively avoids. First, they stop working in the cold due to a little thing called Boyle's Law. The new JPSCS uses an old-fashioned, reliable spring system that works under any conditions and has an innovative buffer system that rides the guide rod with the carrier.

The second problem with the pneumatics is that they didn't have the dead blow hammer effect of a true buffer system. An AR-15 without a buffer is a malfunction waiting to happen. The dead blow hammer effect of the buffer is essential to preventing bolt carrier bounce resulting in ignition failure on account of the hammer impacting the firing pin while the bolt is not fully in battery during rapid fire or full auto fire. The buffer also increases the reliability of a rifle by "hammering" the carrier forward to press the action fully into battery even when the chamber is fouled. In the JPSCS, the buffer itself is "captured" in the assembly providing all the mechanical functionality of a standard buffer retainer plunger but with the fringe benefit of greater ease in cleaning and service thanks that comes with a simple drop-in part like the JPSCS.

The basic system is available for both AR-15 and LR-308/AR-10 systems with an optional spacer to allow function with either carbine- or rifle-length extension tubes. Thanks to ease of assembly/disassembly, we will also be offering substitute spring kits with a variety of spring rates to let you can experiment to find the rate best suited for your particular setup.

I'm already switching every rifle I own over to JP Silent Captured Springs, so don't be surprised if you do the same once you've tried one."

It looks interesting what are your thoughts? I will be waiting for some life fire tests. AKA Over the beach.

imschur · « **Reply #1 on:** January 24, 2012, 03:46:43 PM »

Very cool

Jgun · « **Reply #2 on:** January 24, 2012, 04:57:09 PM »

I'd give this a try. I wonder if this thing is tuned to work with their lightened .308 BCG? That would be a neat setup in a competition .308 AR.

draco41 · « **Reply #3 on:** January 25, 2012, 06:03:27 PM »

DAM YOU MAN!!!! More money out the door

Robocop1051 · « **Reply #4 on:** January 25, 2012, 07:51:50 PM »

Yup, that's what we're here for

unforgiven · « **Reply #5 on:** January 25, 2012, 09:56:40 PM »

Impressive

moagm316 · « **Reply #6 on:** January 25, 2012, 10:31:21 PM »

The thing that I am wondering though is what is the life of this system. This might not be a good solution for a SHTF rifle.

98Z5V · « **Reply #7 on:** January 25, 2012, 10:57:39 PM »

That buffer spring noise in your ear, that some people think is annoying - that always lets me know when I just fired my last round in the mag. When the bolt locks back, it's a completely different sound, and you know it right away. You know it's coming, and when you hear it, you change mags fast.

planeflyer21 · « **Reply #8 on:** January 26, 2012, 06:13:00 AM »

Quote from: 98Z5V on January 25, 2012, 10:57:39 PM

That buffer spring noise in your ear, that some people think is annoying - that always lets me know when I just fired my last round in the mag. When the bolt locks back, it's a completely different sound, and you know it right away. You know it's coming, and when you hear it, you change mags fast.

Jon

survivalshop · « **Reply #9 on:** January 26, 2012, 07:24:36 AM »

Its odd I've only had one rifle that I've heard that noise.I can not recall hearing it in any of the rifles I now own .

A fix for a non existing problem & not time tested or battle proved .

Not that , Battle proved really means much , for a bench rifle or safe queen , but time is another thing.

Nothing wrong with a safe queen , the rifles or hand guns I do not take to the range that day are all safe queens .

I believe that noise is a spring binding problem of some sort . Could be something in the receiver extension , buffer or the spring its self .

unforgiven · « **Reply #10 on:** January 26, 2012, 09:23:31 AM »

I must be deaf cause I'm consentrating on my shooting never notice spring noise.

Robocop1051 · « **Reply #11 on:** January 26, 2012, 09:37:13 AM »

It's kinda like the .45 GAP... No one really understood why we needed it, but damn it was expensive!

planeflyer21 · « **Reply #12 on:** January 26, 2012, 12:07:00 PM »

Quote from: Robocop1051 on January 26, 2012, 09:37:13 AM

It's kinda like the .45 GAP... No one really understood why we needed it, but damn it was expensive!

I know one guy that had a gun in .45 GAP. During the great ammo shortage he was like "What ammo shortage?" GAP being the only stuff sitting on shelves.

It was a fun gun to shoot!

Jon

moagm316 · « **Reply #13 on:** January 27, 2012, 08:32:28 AM »

I have not hear that sound either. I use good springs in all my rifles.

LLArms · « **Reply #14 on:** January 30, 2012, 10:27:07 AM »

Our prototype was going to be running the Enindine buffer setup - but if the JP silent spring setup can offer the same performance and makes it quieter we will go that route.

And its $5.00 cheaper!