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Posted: 10/9/2004 9:14:18 AM EDT
[Last Edit: 10/11/2004 5:50:16 AM EDT by 1911fan]
My latest build (Grizzly lower, no name upper, 20" Bushy barrel) seems to be short-stroking. Fired brass comes halfway out of the chamber as the bolt stops halfway back. The FAQ on short-stroking is down. This upper runs ok on my Bishy/Jewell lower, which makes me think I have a buffer or buffer spring problem.
Any ideas?


Swapped buffers and now the lower works. Weird- the nonfunctional lower's buffer was 6 1/2" long, and the one I took out of a fixed telestock was about 3". Now both uppers work on both lowers. What did I just figure out?
Link Posted: 10/9/2004 11:19:49 PM EDT
[Last Edit: 10/10/2004 9:50:10 PM EDT by Tweak]
Link Posted: 10/10/2004 8:01:41 AM EDT
[Last Edit: 10/10/2004 8:03:50 AM EDT by 1911fan]
Ok, an assumption. The rifle buffer is the long (6"+) one, and the carbine buffer is the short (3") one. So why does my rifle length not work with the long buffer, and why does the fixed telestock work with the long one? Or do I have it bass ackwards?

Oh mighty Tweak, please enlighten me!


Link Posted: 10/10/2004 9:54:10 PM EDT
Link Posted: 10/11/2004 5:01:17 AM EDT
Ouch! Does that count as my first flame?

Since the other two (yeah I know, only two) work ok this has me baffled. Maybe I should rephrase the question: Why won't a rifle length buffer work in a rifle length stock? The only thing I changed to make it function normally was the buffer.


Link Posted: 10/11/2004 9:13:26 AM EDT
Link Posted: 10/11/2004 9:18:18 AM EDT
[Last Edit: 10/11/2004 9:19:38 AM EDT by StealthyBlagga]
Rifles fitted with collapsing stocks MUST be fitted with a carbine (short) buffer. Rifles fitted with non-callapsing stocks (A1, A2 and maybe the old "postban fixed telestocks") MUST be fitted with a rifle (long) buffer. Any other combination will not function correctly and may cause damage to the rifle.
Link Posted: 10/11/2004 1:15:40 PM EDT
[Last Edit: 10/11/2004 5:00:45 PM EDT by 1911fan]
Ok, so an A2 butt should use the long buffer, but it won't cycle with a long buffer...... works fine with a short buffer though. I think we're still on the original question of 'Why doesn't it cycle with the correct buffer installed?" not to mention "Why does the fixed telestock lower cycle with the long buffer?" Bent buffer tube? Brand new and visually straight..... I dunno.


ETA: No pic ability.
Link Posted: 10/11/2004 7:55:59 PM EDT
Link Posted: 10/11/2004 9:29:02 PM EDT
Tweak, I think your email nailed it- without the upper butt screw I can retract the bolt back past the magwell, which I could not before. Off to the hardware store tomorrow for a shorter screw.


1911 fan

Link Posted: 10/12/2004 10:17:02 PM EDT
Link Posted: 10/13/2004 8:38:28 PM EDT
I've got three screws, all the same, 1.146"/.944". None of them have the drain hole. Interesting, I've been ordering from here & there and haven't seen any breakdown of screw or receiver extension dimensions. Or stocks, come to think of it. So my problem seems to be A1 butt + A2 screw.
Another damn learning experience. Where can I order the screw I need, since it's not (apparently) a common thread?


Link Posted: 10/13/2004 10:33:23 PM EDT
[Last Edit: 10/13/2004 10:35:11 PM EDT by Tweak]
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