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Page AR-15 » Rimfire and Pistol Calibers
AR Sponsor: bravocompany
Posted: 5/15/2016 5:59:12 PM EDT
Just finished my 9mm build using qc10 lower  having trouble with the last rnd hold open not catching every time what do I need to do or tweek to get this to work thanks
Link Posted: 5/15/2016 6:21:34 PM EDT
[#1]
This is a standard problem.  Mine does it as well.  There is a FAQ on their website that talks about the LRBHO.  If following that doesn't work, I know a guy who ground a little bit of the metal off and it seems to work better now.  I don't think I'll be doing that, but it's a possibility.  Perhaps Rudy from Macon Armory has some insight on this?  Otherwise, it's pretty much a known issue and very few seem to be able to get it to work.
Link Posted: 5/15/2016 6:58:24 PM EDT
[#2]
That great news I bought their lower for the reason of last rnd hold open . I bought rudys bolt and buffer its works great so far looks great also well put together
Link Posted: 5/15/2016 7:08:10 PM EDT
[#3]
I have this lower. I have the best luck with the ETS mags. You could also try extra power mag springs.

Mine isn't 100%. I don't mind, but some mags work better than others.
Link Posted: 5/15/2016 10:26:42 PM EDT
[#4]
Link Posted: 5/16/2016 5:59:37 AM EDT
[#5]
I trimmed about 1.5 coils off the bolt catch spring and put Wolffe extra power springs in my mags. So far it's been 100% holding open after the last round.
Link Posted: 5/16/2016 7:24:59 PM EDT
[#6]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
I trimmed about 1.5 coils off the bolt catch spring and put Wolffe extra power springs in my mags. So far it's been 100% holding open after the last round.
View Quote


I bought 4 brand new glock mags and 3 of them work..............replaced the springs in 3 mags I had with Wolff extra power springs and the LRBO works fine................
Link Posted: 5/16/2016 9:21:27 PM EDT
[#7]
Link Posted: 5/17/2016 5:46:00 PM EDT
[#8]
Trimmed the spring  twice worked and didn't work  have to try again sat.
Link Posted: 5/19/2016 3:46:51 PM EDT
[#9]


Greetings,

Do you know if you have the "new" type of lever for the LRBHO? If you can search back in the archives, I posted photos showing the difference between them. Using the one that came with my lower (DDLES at the time), no matter how I tweeked it or the spring,  I could never get consistent function. After installing the new one, 100%. Check into that with CQ10, they may be able to tell you which version your lower has. Good luck!

Regards, Jim
Link Posted: 5/19/2016 8:00:36 PM EDT
[#10]
Ok so thanks for the info where do you find the archives listing on this
Link Posted: 5/19/2016 8:11:21 PM EDT
[#11]
Link Posted: 5/19/2016 8:43:27 PM EDT
[#12]
Ok just checked it is flat so it is the new type now what to do
Link Posted: 5/19/2016 9:39:15 PM EDT
[#13]
Link Posted: 5/20/2016 5:16:35 AM EDT
[#14]
Yes used the spring and cut it twice will try and bend the flat area up not sure which part in the mag area you are trimming
Link Posted: 5/20/2016 4:18:16 PM EDT
[#15]
Link Posted: 5/20/2016 10:01:01 PM EDT
[#16]
Didn't cut the spring they sent used another that was close to it cut that one
Link Posted: 5/22/2016 6:39:59 PM EDT
[#17]
Shot around 80rnds sighting in not a hicupp lrbho worked and had maybe 2-3 times it didn't hold shot decent with factory excellent with reloads out to 200 yards I was amazed .
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