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Posted: 11/10/2004 2:18:52 PM EDT
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Ok...being the impatient bastich that I am, I couldn't wait to get the Izzy brake off. It isn't that bad...just grind until the pin is visible below the weld, drill a little hole side-on to the pin so you can get a grip on it, and lever it out. Threads are fine, the hole was drilled neatly. Oh, and a propane torch is needed to heat the brake to melt the Loctite. It will not unscrew if you don't heat it. It's easy.... |
Yes, it's a 16". I'll measure OAL when I get home (I'm in class right now). The new carbine buffer is not proven yet, but I will post chrono data as soon as I get out to shoot it, which may be tomorrow, if I can't hold my horses any more successfully than I did today. I'll chrono 155gr TAP, L2A2 ball, and Remington 150gr FMJ. Patience, grasshopper! |
Are you psychic?  I'm curious about OAL and MV compared to an 18" M1A Scout. Decisions decisions... |
No, it's running good so far, at about 350 rounds. How many rounds do you have through it after installing a new extractor? This is the second time I've heard this. My theory, fwiw, is that the stock buffer isn't heavy enough. This is putting excessive stress on the extractor. My buffer is almost 30 grams heavier than the factory buffer. |
You have to start with a Colt 9mm buffer...pull the pad out of the end, dump the weight stack out, and cut it to 1.940". Then, trim 1/8 off BOTH ends of the buffer pad using a razor blade. You'll need two tungsten weights from Slash, because the steel ones aren't heavy enough. Drop the two new weights in, using the poly discs from the old buffer stack, then press the end pad back in (takes a vise). You should wind up with a completed OAL of 2.21" and a weight of +/- 160 grams. Cut the factory buffer spring to 29 coils, install, and check to make sure your bolt will lock open on an empty magazine. The factory buffer weighs 130 grams, so the increased weight should decrease stress on the extractor. Tip: Colt 9mm buffers are harder than the hammers of hell. I ruined two lathe bits trying to cut it, and finally gave up and cut it with an air driven grinding wheel (left a little long) and dressed it up with a file. |
| QS, have you noticed the grip on the Bushmaster .308 to be the same as any AR15? I tried to put a Houge on for a guy and was having difficulty getting it to sit flush with the receiver. He was rushed and so was I, so I cant be sure it didnt fit or if I just needed to work with it for a sec. Was wondering if you had noticed anything? |
| I contacted Bushmaster yesterday about the broken extractor and they were apologetic. They are going to take care of the problem ASAP. I'll let you know when I am back up and running. Interesting posts about the buffer weight!!!!!!!!!! Has anyone contacted Bushmaster about this? |
The one time I called and asked them about this stuff they were very reluctant to even talk about it. |
Well, the problem is going to be its length. If it's not the right length it doesn't matter... |
Aren't those the old style ones? I thought Gem-Tech discontinued that type?
Anything, I'm dying here. 
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Yeah, they did. Someone contracted them to make a special run. I'm gonna get one of those.  I'll get it done later when I get home...
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Are you getting this from Gem-Tech, or are you buying it from some other place that you would care to share with us (me)? 
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I'll IM you when they're available. |
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OK...I just talked to a gunsmith at Bushmaster, after ordering a Field Repair Kit for my rifle. I was wanting to pass along my theory that the factory buffer is too light, hence the broken extractors. If I understood him correctly, he said he knows the factory buffer is too light, and their (proprietary) collapsible stock assembly will have a heavier buffer. I got the impression he thought I was  . |
I hate proprietary parts. 
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The extractor was replaced and the BAR-10 now has developed a feeding problem. It's not just with one magazine, but all 5 of them. I was not happy about it, because I was all pumped up to use the rifle at a tactical match. My rifle is on it's way back to Bushmaster again!!!!!! Hopefully they will get it straightened out this time. My rifle has spent more time down with problems than up and running. I have only been able to fire 518 rounds through it. All this traveling back and forth to Bushmaster through UPS is making my rifle homesick. So much for my plan to replace my M1A with the BAR-10. After firing 600-800 trouble free rounds I had planned on selling my M1A. I have not been able to fire too many rounds through my BAR-10 without problems, so I'm not sure that's a good idea now. I'll give Bushmaster one more chance to make things right. If I have any more problems, the rifle will be up for sale. |
Im eagerly awaiting this item. Cav Arms designed it as a replacement for a CAR buffer. It seems the .45 acp uppers were damaging their MK II lowers. They stepped up and designed this part. Seems to me that it might be what you are looking for. |
You must have gotten a bad one. Mine has almost 800 rounds through it and hasn't missed a beat. I wouldn't give up on it - Springfield has put out some fucked up M1As too... |
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