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Posted: 10/2/2017 4:01:56 AM EDT
[#1]
99.87% no problem.
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Posted: 10/2/2017 4:11:23 AM EDT
[#2]
Wouldn't change a thing, it would be an upgrade if anything.
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Posted: 10/2/2017 6:26:35 AM EDT
[#3]
Should run reliably with the buffer you are currently using.
If the Ruger barrel is high round count, checking headspace with gauges is a good idea. |
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Posted: 10/2/2017 8:27:02 AM EDT
[#4]
Full-auto BCG?
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Posted: 10/2/2017 8:50:53 AM EDT
[#5]
Quote HistoryQuoted:
Full-auto BCG? .
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Posted: 10/2/2017 8:59:02 AM EDT
[#6]
Quote HistoryQuoted:
99.87% no problem. |
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Posted: 10/2/2017 1:16:22 PM EDT
[#7]
In what situation would require a buffer change? I guess if somehow the BCG was made lighter? The buffer weight would need to go up?
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Posted: 10/2/2017 1:28:29 PM EDT
[#8]
Quote HistoryQuoted:
In what situation would require a buffer change? I guess if somehow the BCG was made lighter? The buffer weight would need to go up? A FA bolt carrier will probably just slow down the cycling of the weapon a small amount, making it a bit more reliable. I would think in todays world, factory rifles that come with a semi carrier, do so just because they don't want any legal issues. Of which there would not be any.. |
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Posted: 10/2/2017 2:51:17 PM EDT
[#9]
I run both 16" and 14.5" in both carbine and mid gas, standard and H buffer run fine. I shoot AE 223 and Wolf Gold mostly. Federal 5.56 runs fine as well.
If you want to experiment, KAK sells buffer weights so you can tune/build your own buffer. |
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Posted: 10/2/2017 6:59:22 PM EDT
[#10]
Of my 5 ARs, only 1 runs a semi carrier. Other 4 are full profile. Never a problem.
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Posted: 10/2/2017 7:17:58 PM EDT
[#11]
just switch bolt carriers
I don't like mixing used bolts with used barrels. |
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Posted: 10/2/2017 8:10:55 PM EDT
[#12]
Safe? Yes
Legal? Yes (unless you live in WA state or some place with crazy laws). It should be more reliable (if anything) due to the extra weight. Unmarked carbine buffers are almost always standard carbine buffers. No, you do not need to compensate for extra mass by adding extra mass. 
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Posted: 10/2/2017 9:01:27 PM EDT
[#13]
Based on the ones I've weighed, you'll gain about 0.5 oz. of weight when going from a semi-auto to a full auto (full profile) carrier.
That's roughly two-thirds of the weight you'd get by going to the next heavier buffer and should cause no problems unless you were on the very ragged edge of not cycling to start with. Which is probably not the case given your setup and description. Area in question circled in photo. 
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Posted: 10/2/2017 10:58:57 PM EDT
[#14]
Would the gun wear and tear faster with a carbine buffer, despite it being reliable?
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Posted: 10/2/2017 11:36:40 PM EDT
[#15]
Nope.
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Posted: 10/3/2017 6:24:24 AM EDT
[#16]
Quote HistoryQuoted:
Nope. |
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Posted: 10/3/2017 7:52:12 AM EDT
[#17]
Edited. This is not GD - Old_Painless
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Posted: 10/3/2017 8:40:40 AM EDT
[#18]
Quote History |
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Posted: 10/3/2017 8:50:16 AM EDT
[#19]
Quote HistoryQuoted:
4 poster with a bait question? Maybe, but it isn't bait, because a FA carrier is legal. Quote HistoryQuoted:
4 poster with a bait question? Maybe, but it isn't bait, because a FA carrier is legal.  in, that's his bait
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Posted: 10/3/2017 2:47:31 PM EDT
[#20]
Quote History |
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Posted: 10/3/2017 3:50:34 PM EDT
[#21]
If you own a Colt with the hardened steel block in the lower receiver that precludes the use of a full auto and even a semi-auto bolt carrier you will have zero problems. Those limited production Colts appeared for a short time around 1992 - 1994 and has bolt carriers with virtually no material on the bottom 1/3 of the rear. A standard semi-auto or auto bolt carrier will not function in those rifles, all others are GTG.
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Posted: 10/3/2017 7:27:34 PM EDT
[#22]
Without seeing the bolt carrier, and the hammer, I can't tell you how swapping the BCG from a semi-auto to a full-auto will affect the operation of the gun.
Semi-auto bolt carriers come in different flavors, including those with shrouded firing pins (and those without shrouded firing pins), and the whole world of full length, partial length, half circle, and full circle rear sections. Unshrouded firing pin semi-auto bolt carriers are getting pretty rare, but if your bolt carrier is unshrouded, the firing pin, and firing pin retaining pin can get damaged by contact with the hammer. If your gun has a unshrouded bolt carrier, the bolt carrier can hang on a notched hammer, and switching to a full-auto bolt carrier, and round hammer can improve reliability. If your semi-auto bolt carrier has a unshrouded firing pin, and half-circle body, the weight difference between a full auto bolt carrier, and your semi-auto bolt carrier will be more than .5oz. The gun was designed to operate with the extra weight of the full-auto bolt carrier, and restoring the proper weight to the bolt carrier assembly will not hurt reliability. From my experience, the full auto bolt carrier, with a round hammer will wear slower than a semi-auto bolt carrier with unshrouded firing pin, and a notched hammer, and is likely to not suffer from firing pin and firing pin retaining pin damage (when compared to a semi-auto bolt carrier with unshrouded firing pin and notched hammer). |
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Posted: 10/3/2017 7:39:17 PM EDT
[#23]
Good to hear. My Ruger AR's BCG is unshrouded, but it isn't a half circle, its a typical semi auto BCG. So I guess I actually made a reliability improvement to my MPR, which is always a good thing. I don't plan on using it for home defense anyways, but an upgrade is an upgrade. My Colt LE6920 will remain my home defense rifle.
If anyone can tell me how to embed images, it would be appreciated. I'm already using the img html tags, but they aren't working. Here are some pictures of the toolcraft BCG I bought: 
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Posted: 10/3/2017 8:14:39 PM EDT
[#24]
Your pics are showing. Post count under 50 means your pics show as links until approved by several team members.
Nice looking rig. |
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Posted: 10/3/2017 8:20:21 PM EDT
[#25]
Quote HistoryQuoted:
Full-auto BCG? |
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Posted: 10/4/2017 7:29:28 PM EDT
[#26]
OP, if I may ask why do you feel the need to swap the BCG? Have you had any functioning problems with the Ruger BCG?
If the gun is working well as is I'm not sure what actual benefit you are expecting from a new BCG. |
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Posted: 10/5/2017 4:12:50 AM EDT
[#27]
Because I wanted to feel good knowing I have an upgraded BCG. I like having a full auto BCG. A shrouded firing pin.. etc. and as mentioned above the increase in reliability it provides.
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Posted: 10/5/2017 10:44:03 AM EDT
[#28]
Unless the weapon is on the ragged edge of short stroking it should work.
You should check headspace. I have seen several bolts at both the min and max tolerance. The allowed tolerance for bolts .003” so there is a potential for the headspace to be out. |
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Posted: 10/5/2017 12:28:14 PM EDT
[#29]
Colt has b shipping their 6920's with Auto BCG for quite a while.
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Posted: 10/5/2017 3:21:54 PM EDT
[#30]
Quote HistoryQuoted:
Because I wanted to feel good knowing I have an upgraded BCG. I like having a full auto BCG. A shrouded firing pin.. etc. and as mentioned above the increase in reliability it provides. I've never had an unreliable semi BCG as long as the gas key screws were properly staked and the materials were of a known quantity. Your rifle and your money, use whatever you like. |
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Posted: 10/6/2017 3:53:34 AM EDT
[#31]
Quote HistoryQuoted:
Unless the weapon is on the ragged edge of short stroking it should work. You should check headspace. I have seen several bolts at both the min and max tolerance. The allowed tolerance for bolts .003” so there is a potential for the headspace to be out. |
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Posted: 10/6/2017 7:39:00 AM EDT
[#32]
It is up to you.
It is a tolerance stacking issue not how good the manufacturer is. It is a civilian manufacture weapon not military where by contract the parts of weapons must be interchangeable within a given lot. I have found a number of bolt/barrel combinations that did not pass a headspace check even though the bolts were in spec. |
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Posted: 10/7/2017 2:07:01 PM EDT
[#33]
I put a BCM FA BCG in my 13-year-old Wyndham Bushmaster about seven years ago. It works better than the original BCG, which I keep around for an emergency spare. No problems at all.
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Posted: 10/19/2017 5:44:22 AM EDT
[#34]
Quote HistoryQuoted:
Safe? Yes Legal? Yes (unless you live in WA state or some place with crazy laws). And that prohibition doesn't apply to a FFL with SOT. |
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Posted: 10/19/2017 12:20:14 PM EDT
[#35]
My mistake.
That’s what I had heard from guys in WA state. When I read the law, it looked pretty vague. What parts do they define as “exclusive” to a MG? Does one have to be a SOT to own a MG there? |
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