LRBHO question...

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GregB

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Recently paired a Foxtrot Mike 16" side charging upper with Aero precision lower with LRBHO. Glock mags. Have tried two different Glock mags and neither will lock the bolt back after firing. Also have a 3 ETS mags that the won't even allow the bolt to rack when seated. Curious as to what the issue is? Upper or lower? Suggestions?

Thanks.
 
The ETS mags won’t let it function when they’re full? Empty? All the time?

If it’s when full, have you tried downloaded by 1?

Got a link to the lower? Not sure how Aero does the LRBHO, or are you using a magwell adapter?
 
The ETS mags worked in the Ruger PC. Inserted empty, they won't allow bolt to move. Also, I thought the Aero had LRBHO but not seeing it on the website now. Gun runs great, but I really want LRBHO.
 
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The Aero EPC lower definitely has LRBHO. I’m not sure why it would matter, but I could be that their lower isn't compatible with a side charger upper?
 
This is the main reason I’ve stayed away from 9mm ar15s. Certain lowers allow lrbho with certain uppers but every 9mm ar15 I’ve ever seen in person has been finicky.
 
Bigdave0924 said:
This is the main reason I’ve stayed away from 9mm ar15s. Certain lowers allow lrbho with certain uppers but every 9mm ar15 I’ve ever seen in person has been finicky.
Click to expand...
I've been pretty impressed with the cmmg delayed blowback guns.
 
Thanks Jerzssubbie. I kind of figured that was the problem. I'm may just sell the upper and buy another.
 
I emailed both Aero and Fox Trot Mike. FTM replied and said that the LRBHO is in the lower. Waiting to hear back from Aero....
 
My FM9 uppers all required LRBHO to be in the lower. I use a Stern Defense adapter in a standard AR lower.
 
Aero says that there's is in the upper. LOL. Just my luck. Ordered a FTM lower, just tried it out last night LRBHO works like a champ. Now I've got a "extra" Aero 9mm complete lower. Need to sell it or build a pistol on it. We'll see.
 
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