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MI, USA
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Posted: 12/28/2023 11:19:58 PM EDT
How’s quality with BCA? Debating on buying a lower and upper from them for an AR9.
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Posted: 12/29/2023 12:16:24 AM EDT
[#1]
I have a 45acp BCA rifle that works fine, shoots well. I also have a 9mm side charging upper on a PSA lower, uses Glock mags. if you go that route, be sure to add shims to the buffer spring so the bcg doesn't bottom out.
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MN, USA
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Posted: 12/29/2023 12:23:56 AM EDT
[#2]
Originally Posted By Savageman: How’s quality with BCA? Debating on buying a lower and upper from them for an AR9. Same QC crapshoot as ever. |
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MI, USA
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Posted: 12/29/2023 9:36:21 AM EDT
[#3]
Quote HistoryOriginally Posted By s4s4u: Same QC crapshoot as ever. What do you mean? I don’t have experience with ARs so not sure if BCA is good. |
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MI, USA
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Posted: 12/29/2023 9:37:31 AM EDT
[#4]
Quote HistoryOriginally Posted By olscruffy: I have a 45acp BCA rifle that works fine, shoots well. I also have a 9mm side charging upper on a PSA lower, uses Glock mags. if you go that route, be sure to add shims to the buffer spring so the bcg doesn't bottom out. I’m very new to ARs and not sure what you mean about the shims. |
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Posted: 12/29/2023 10:32:54 AM EDT
[Last Edit: Blowback9]
[#5]
I think he is referring to the fact that a 9mm bolt will overtravel rearward if you use a carbine-length buffer. 9mm bolts are 3/4" shorter than AR-15 BCG and so need a spacer in the back of the buffer tube when using the old style carbine-length (3.25") 9mm buffer. Otherwise you could damage or break the bolt catch. Most folks now just use an extended (4") 9mm buffer.
All the details... What 9mm buffer do I need??? (and spring) Check out the rest of the site to answer all your 9mm AR questions... Blowback9.com |
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Posted: 12/29/2023 3:54:45 PM EDT
[#6]
Quote HistoryOriginally Posted By Savageman: I’m very new to ARs and not sure what you mean about the shims. with just the buffer & spring, the side charging handle would come back far enough to strike the back of the slot it moves in. Some makers use a spacer. I just put 7 quarters under the buffer spring to have the bolt stop at the right place. I like BCA, but they could have noted on the webpage that Buffer Spring May Need 'A Spacer. |
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MN, USA
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Posted: 12/29/2023 6:48:31 PM EDT
[#7]
Better to get a proper 9mm buffer that is 4"ish in length than adding a spacer behind a carbine buffer.
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ID, USA
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Posted: 12/30/2023 2:45:52 PM EDT
[#8]
Quote HistoryOriginally Posted By olscruffy: with just the buffer & spring, the side charging handle would come back far enough to strike the back of the slot it moves in. Some makers use a spacer. I just put 7 quarters under the buffer spring to have the bolt stop at the right place. I like BCA, but they could have noted on the webpage that Buffer Spring May Need 'A Spacer. OP.....whatever you do, DON'T stick quarters in a buffer tube. This is hack/bubba type of shit. There are plenty of 9mm buffers that are manufactured for the proper length to prevent over travel, and they will help control the blow back recoil action depending on the weight you choose. OR just buy the correct 9mm spacer if you choose to not use a 9mm length buffer. All this is discussed in the various threads/links at the top of the thread list with the stickies. . |
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USA
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Posted: 1/21/2024 3:50:10 PM EDT
[#9]
BCA AR9 Upper is my next purchase also. I'm buying one without hesitation, as their 22LR & 7.62x39 Uppers run 100% for me, NO problems at all. I plan on the correct buffer purchase, my glock mags, and Stern's Mag Adapter for one of my lowers. I only started buying BCA Uppers in August this past year, so far have 3 to date. I use the CORRECT mags for both the 22lr and 7.62, mil spec triggers, H2 buffer in the 7.62, gives me 100% functioning with everything I feed it!
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