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bearleft

PA-10 GEN 3

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Hello everyone.  First time poster here.  I have enjoyed reading the discussion forums here for about 6 months now.  Since I haven't seen much discussion about the PA-10 Gen 3, I though that I'd respond to this thread.

I bought a Gen 3 PA-10 as a separate lower and upper this Summer (2020).  So this production run incorporates whatever fixes PSA has accepted from the prior generation feedback.  The upper is the 20" stainless, with a floating M-Lok handguard, and NiB bolt carrier group.  The lower is pretty standard, with the EPT.   I normally don't shoot .308 at our local indoor ranges, so have only fired it the one session to zero the flip-up iron sights.  I guess that I fired only five 3-shot groups, because I had only visually boresighted the barrel to the iron sights at 25 yards at home.   I had cleaned and heavily lubricated the rifle before taking it to the range, and had manually worked the action about 100 times or so.  I was using new PMAG 10-round magazines.

In summary, it ran without incident for all rounds fired, which were plain 150 grain Federal.  I shot one group at 10 yards (single cartridge, then two cartridges in the magazine), adjusted the rear sight one click, and then repeated the three-shot group.  Then moving the target to 25 yards, I repeated the process twice, but with three rounds loaded into the magazine.   I adjusted the rear one more time, and then moved the target out to 50 yards, the limit at my range.  I fired one three-round group and called it good enough. 

Using the iron sights, I managed ~1.25" (supported) at 50 yards, so I'm encouraged.   The brass ejection was ~3 o'clock, neither forward or backward.  Next I'll mount a small scope and find somewhere to shoot at 100 yards.  But, so far, so good.  I thought that folks on this discussion board would want to know.

Edited by phil_gretz
grammar

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Good to hear. Did you buy the lower w/a fixed stock or the carbine stock. Where does the gas tube end in the cam cutout? The fixed stocks have had much less cycling problems than the carbine stock. My PA 10 w/the fixed stock cycled fine from the factory.

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14 hours ago, shooterrex said:

Good to hear. Did you buy the lower w/a fixed stock or the carbine stock. Where does the gas tube end in the cam cutout? The fixed stocks have had much less cycling problems than the carbine stock. My PA 10 w/the fixed stock cycled fine from the factory.

I bought the adjustable stock lower.  Looking at the gas tube today, it falls short of reaching the mid-point of the semi-circular milled cut-out on the upper receiver.  Maybe at the 40% point?  

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15 hours ago, phil_gretz said:

I bought the adjustable stock lower.  Looking at the gas tube today, it falls short of reaching the mid-point of the semi-circular milled cut-out on the upper receiver.  Maybe at the 40% point?  

"Adjustable stock lower" could mean a few things - rifle recoil system with a MagPul PRS stock.  Carbine recoil system with a standard 6-position setup, and a carbine buttstock that slides.  Weird combo for a 20" barrel, but if the recoil system is right, then it doesn't matter what your barrel length or gas system is - as long as gas system and recoil system are balanced.  If it's truly the carbine recoil system...  then... 

You'll also find that the buffer is too light, the receiver extension won't be the right internal depth, and the gas port will be too small.  It probably has an AR15 recoil spring in it.

Just being honest, based on history here with these things.

Edited by 98Z5V

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On 10/20/2020 at 11:36 PM, 98Z5V said:

"Adjustable stock lower" could mean a few things - rifle recoil system with a MagPul PRS stock.  Carbine recoil system with a standard 6-position setup, and a carbine buttstock that slides.  Weird combo for a 20" barrel, but if the recoil system is right, then it doesn't matter what your barrel length or gas system is - as long as gas system and recoil system are balanced.  If it's truly the carbine recoil system...  then... 

You'll also find that the buffer is too light, the receiver extension won't be the right internal depth, and the gas port will be too small.  It probably has an AR15 recoil spring in it.

Just being honest, based on history here with these things.

I weighed the buffer and measured the internal depth this morning.  The buffer weighs 3.8 oz, and the internal depth measures 6.996 in.  The spring has 27-28 coils.

20201024_094346.jpg

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Carbine Recoil System - the depth is right on the extension, so hang on to that part. Buffer is too light, needs to be close to 5.4oz, and the spring needs to go.  The spring of choice would be the Sprinco Orange spring - it's made specifically for these 7" .308AR carbine recoil systems.  KAK make a stainless-bodied buffer that weighs 5.3oz, and that's close enough.

Edited by 98Z5V

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Thank you.  I'll locate those items and install them this Fall.   I'll be glad to avoid future reliability problems.  I only have a very few rounds fired for this rifle, so don't know what I don't know...

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