PSA Gen4 16" 9mm Nitride 1/10 13.5" Lightweight M-lok Railed Upper With BCG & CH - 5165449632

The only issue I had with the upper was in the beginning when the BCG would get stuck in the rear position when attempting to charge the weapon. I cleaned it and oiled it, but it kept getting stuck in the rear position. I have the PSA lower also, so there should of been no issues. After repeatedly striking it with the palm of my hand and getting the BCG into battery, it fired. After several rounds of heavy 9mm loads fired through it the BCG does not stick anymore. I guess the burrs were knocked off. No issues firing after that and no stoppages.

the upper works well, accurate and no FTFs.

When it does feed it shoots very well. Running an Anderson lower with PSA parts kit, endomag and federal 115 grain ammo. Took about an hour to shoot 100 rounds due to constant failures to feed. Also I miss having a shell deflector, running it seems to spit back some hot stuff if you’re shooting it left handed.

Great price, looks good. Seems accurate enough even with the cheap sights I put on it. The 16" barrel makes 9mm almost suppressor quiet. Works great with my endo-mags in a standard AR lower.

I have two of these. Both are on PSA Glock magazine lowers. One was a PSA complete carbine that I replaced the more convention upper with, one was on a PSA lower. I set this up with a C-More Rail sight and a CMC 9mm Singe stage trigger and gave it to one of my students It is the perfect weight for steel competitions, and completely reliable. He has won two competitions with it in the three months he has been shooting.

Purchased this 8" and the 16" upper with Gen4-9 BCG. Was sticking when pulling back charging handle. Couldn't figure out the problem. Low and behold, one of the only drop-in triggers that won't work with the PSA Gen4 BCG is the Rise Armament RA-140. Replaced with standard Mil-Spec trigger and now works fine.

This thing is amazing

The recommendation of modified pmag is a little trying on my patience.

I mounted this upper to a "Glock" PSA lower, shoots perfect.

I do like the "Colt" lower over the "glock", but they're always out of stock. The "glock" canted magazine just don't look right.

But, PSA is always quality.

Real fun gun to shoot. Cheap ammo, 100% reliable . Would like to have a fixed front sight and ejection port cover.

A much more precise gun than its 4inch upper.
A general purpose carbine.
Goes well with PSA Glock lower or a modified Colt lower.
A good plinking gun as well a defense weapon.
And with 9mm being cheaper than the other AR 15 ammo you can stretch your bang for your buck.
And like the AR15 many use of optics or attachments on the M lok handguard.

I put this upper on a lower that was completed with parts from a SBA3 and lower kit Very accurate

Really nice upper works perfect on new frontier lower

I've been purchasing PSA stuff for some time but this PCC is a game changer. I've focuses on pistol but have seen the expansion of PCC shooters in the past year. After 1000 rounds I can say it is exciting to go to the range again. At 60 yards the average shooter can place every round inside a quarter. It is crazy accurate and a blast to shoot. Building two more. They can be tricked out but just stock is fantastic. Best thing I own.

The upper is running well, and accuracy is good, but it a little to cold in Wisconsin (+3 deg) for an all out test. The only issue I have is with the M-lok. It is pitched up making it hard to work with for a front sight. I was planning to use iron sight on this build. The problem is that the M-lok is too light and distorted when the the mounting screws were tighten. A tec was going to call but I have yet to hear back. A shorter M-lok would lessen the issue, or make it stronger.

Works great. About 300 rounds so far. Eotech zeroed at 25 yards.

Was and still am very happy with the upper, barrel and hand guard. Out of the box it all looked nice and ready to go. Received this reasonably quick considering it was ordered a few days before Christmas.

As good as the upper, barrel, and hand guard looked, the BCG outward appearance was just the opposite, it looked rough and used a bit more than just a test round or two. I am sure there are many of us who don’t shy away from PSA’s blems, I have not been disappointed with any of the blems because I know that is what I am getting. However, this is a brand-new BCG and it looked worse than any blem product I have received. Took it to the range and on the 32 round it no longer fired. From what I could tell, the firing pin was stuck and not resetting so the hammer could strike it. Removed firing pin retaining pin, so the firing pin could be removed thinking an easy fix, not the case. Could not get it out at the range or even when I got home to my tools.

Customer Service: PSA customers who’ve had to make a call to them understands it going to be a painfully long wait time to get to a person, I think mine was 26 minutes. Despite the on hold wait time, it was a positive interaction. Prior to this call, I did take the time to photograph and email my displeasure with the BCG upon receipt, in which did get answered a within a day or two and hit my inbox just about the time I hit send on the phone to discuss the BCG failure. My phone call was picked up by Theresa and she got it all set up to be returned and replaced. Got a shipping label and got it out on 1-7-19, UPS shows they received the returned BCG on 1-10-19. Be nice to have the replacement by the end of next week.

It was a few months between purchase and when I actually got a chance to shoot the rifle. I was running a red dot and a PSA Colt magazine lower.

In the first fifty rounds I had several stovepipes. When I shot the rifle left-handed I noticed an extreme amount of blowback that felt like shooting a suppressed SBR, and a flash at the chamber.

It continued to function and was an awful lot of fun to shoot for the next few rounds, until one of the casings failed to eject so badly that the malfunction couldn't be cleared without a tool and that ended the range day.

Next time at the range, was able to put less than a magazine through it before it stopped working completely. The hammer would fall, but it would not fire.

I have over $600 dollars into this gun at the moment between upper, lower, and sights, and at the moment it's an expensive paperweight. I'm afraid that I won't be able to RMA it because it was so long between when I purchased it and when I was able to shoot it.

Shoots touching groups at 50 yds and no malfunctions so far. I'm pretty impressed.

Best value for the money ever!!! Don’t hesitate and buy one, HIGHLY recommend!!!

Love it so much I bought a second one and did the NFA thing with it to make it an SBR. Great receivers for a great price.

Very accurate for a PPC and works perfectly