Questar's RRA 9mm upper/lower combo... I got one!

[WolFF]

too bad theres no 9mm mags like the black dog 22lr . where you dont need a magwell block

 

[P0WERWAGON]

I'm very confused because we never sold any "first generation" ten round 9mm mags from C-Products. The original design that they supplied for testing did not function properly and was rejected. If you got some of those I'd really like to know from where

a friend of mine had you steel mags. didn't work in his 9mm. sold them off. for me, none were from you. they were all US mags. my gun isn't from you. just a franken gun i built.

C-Products told me the same thing about the magblock up or down. i adjusted mine all the way up and down, same thing. not a single change. funny part was, those "junk" plastic mags functioned 100% regardless were the block was.

i know i can't trust my plastic mags when SHTF, but thats what 223 is for...

 

[easy]

Are followers for the C-Products 10 round mags available separately?

I need a replacement. I lost one.

 

[greentips]

http://www.cproductsllc.com/shop/product_info.php?cPath=22_37&products_id=60

 

[easy]

Hey thanks for that GT, I should have mentioned I need a follower for a 9mm mag. Magazine replacement kits on their website seem to be for 223 and the like. I don't see any 9mm mag parts.

 

[easy]

...I think RRA should make a custom one with a deeper mag notch.

I think that's the last thing we need. Another out of spec part to deal with. It's bad enough that Colt uses a different Bolt catch for their 9mm mag block. It's easy to recognize that part, but a slightly wider shelf on a mag catch would not be so obvious.

Also, you need to be careful that the mag catch lip isn't too long, as it will interfere with the follower in the magazine.

I use an older RRA mag block with Colt factory 9mm mags. I bought mine from RRA about ten years ago. I'm not sure if they have changed in some way, but I've never had a problem with the catch, or mags dropping unexpectedly.

The mag catch lip protrudes far enough into the magwell, (and the mag block fits perfectly into my Dlask lower) that when the magazine is seated, the protruding amount of the lip is enough to engage the magazine notch and only take up the the thickness of the magazine wall before interfering with the mag follower.

Colt mags are a very precice fit in width in my RRA mag block as well. Can't say the same for the CProds 9mm mags. CProds mags fit just so slightly looser in my RRA mag block, but still, CP mags will not drop out on their own. I would say that the probs people are having are not RRA related, (so quit bashing THEIR products) but a CP mag spec issue.

Another concern I have with CP mags is that the mag catch notch may not be cut in the correct spot to lock into the best position to avoid feeding problems. I think this is where CP mentions that you need to play with the height of the mag block 15-20 thou. to get it to feed right. I don't have this problem with my RRA block and CP mags, but I'll tell you if I did, and I couldn't use my Colt mags without readjusting my mag block ... the CP mags would be gone.

 

[easy]

"acrashb" zeroed in nicely with this sentence:

Maybe your mag catch is off spec? Maybe the mag block is off spec? Maybe your lower is a bit off? Maybe the mags aren't quite right? Maybe all four, and you have fallen victim to tolerance stacking. You just don't know - so call the vendor.

 

[pc9]

So anyone want to send me a few differant mags to try

 

[Frozen Snake]

The mag catch is almost flush to the adapter. There is not enough material on the catch to retain the mag in the well. It is very apparent on inspection. You need the same amount of material added to the catch that the adapter has taken away in the mag well.

 

[easy]

The mag catch is almost flush to the adapter. There is not enough material on the catch to retain the mag in the well. It is very apparent on inspection. You need the same amount of material added to the catch that the adapter has taken away in the mag well.

Are you sure you have an in-spec catch? .... and how well does the RRA mag block fit in YOUR receiver? If there's lateral play, can you pinch the mag block to the left of the magwell while you tighten the allen bolt?

 

[Steve99]

With my mag catch and magwell there was no amount of adjustment available that was ever going to hold a mag in. I did try shimming the magwell all the way left, wasn't enough. Now if the mag was super tight in the magwell it might have held in, haven't found a super tight mag yet though. The catch sticks out of the magwell adapter less then half a mm. With a little rework to the mag catch it now locks mags perfectly so I'm good for now. I'll see about getting another mag catch from Questar, maybe it will make a difference.
I see nothing wrong with a custom mag catch since the 9mm already needs a different hammer/buffer/magwell/magazine.

 

[Frozen Snake]

With my mag catch and magwell there was no amount of adjustment available that was ever going to hold a mag in. I did try shimming the magwell all the way left, wasn't enough. Now if the mag was super tight in the magwell it might have held in, haven't found a super tight mag yet though. The catch sticks out of the magwell adapter less then half a mm. With a little rework to the mag catch it now locks mags perfectly so I'm good for now. I'll see about getting another mag catch from Questar, maybe it will make a difference.
I see nothing wrong with a custom mag catch since the 9mm already needs a different hammer/buffer/magwell/magazine.

x2

Same set up, same problem.

 

[ghostie]

O.k., good news... I think I have my 9mm AR figured out! I saw this on the C-Products webpage:

"If purchasing a 9mm magazine for use in a Rock River Rifle, you will need to adjust the magazine block .015-.020 lower to function properly in this platform."

For some reason, I had thought that adjusting higher was what needed to happen. I don't know why I thought that, but anyway, it is the reverse.

Before, I could not really get a chambered snap-cap to eject when testing the rifle buy just pulling the charging handle back sharply. Maybe once in 10 rounds it would just barely make it out. Of course this did not bode very well for live fire at the range, and the results were about the same with live ammo (maybe slightly better.. which I think is due to more force/gas in the mix).

What I did was, seperate the upper and lower reciever. Unscrew the magwell adapter and take it out. Then put the magwell adapter in until it clicks in to the mag release. Then push it down from the top as far as it will go so that there is a gap (2 to 3mm) between the top of the lower reciever and the top of the magwell adapter. Then tighten up the screw.

I put it together. Made sure the mags still clicked in - and they did. I chambered a snap-cap, pulled the charging handle back sharply, and Voilà! The snap-cap comes flying out of the gun a good foot or more. I tried it 5 more times, same result.

I hope to try it at the range tomorrow. We have had three major snow storms in the last 2 weeks in Vancouver, and no one was answering the phone at PoCo today, so we didn't try it. If anyone knows if it is open, let me know. I want to try this AR now.

I also want to say, I have nothing but good things to say about Mark and Questar. I plan on buying more from then soon. The service is excellent. The products are excellent. The only thing I would suggest is, it might be worth adding the text from the C-Products website on the little piece of paper that comes with the mags. I found that much more helpful than the text on the Questar insert - at least for my particular gun.

 

[jsullivan]

Here's another question. Let's say I wanted to set up a lower for "non .223". Would a lower with a 9mm hammer and buffer have any problems with these new .22LR uppers?

I don't think the buffer would really come into play, so I think it would only boil down the 9mm hammer. Is it large & heavy enough to hit the firing pin on the .22LR upper?

Has anybody tried it? Can any of you guys with the Tac Sol .22LR uppers comment?