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Old January 11, 2013, 13:30   #1
BlackgunCO
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Gwinn Bushmaster Disassembly? Now With Pictures!

Anybody have any idea how to field strip one of these Got an early one with "R" prefixed serial #. Any idea when this was made? It is a fixed stock version in the 15xx range. Butt ugly, but kind of cool in its own way.

Last edited by BlackgunCO; January 12, 2013 at 10:33.
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Old January 11, 2013, 14:21   #2
falmouth308
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Push out the rear takedown pin from the right side. Remove the return-spring retainer located to the rear of the front site block by pulling it up and away from the hand-guard/weapon. This is a U-shaped part that sits in an opening machined into the front site/gas block. Rotate the return-spring guide 180 degrees until the flat area us up, allowing the bolt-carrier and all other parts to slide to the rear. Remove the charging handle and the bolt-carrier will slide all of the way out of the rifle. The blue bumper at the rear will wear out after 2000 to 3000 rounds. I will look for the paperwork as to the supplier for a replacement. Bushmaster sold off their inventory ten years ago for this style so all parts are WECSOG
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Old January 11, 2013, 17:36   #3
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Think mine must be set up different than yours. Nothing in front of handguard comes off. Mine has charging handle on top like an Uzi. There is some kind of thing at the back of the hand guard opening on top. It has a screw in it. It is right in front of the charging handle when the bolt is closed. I'll try and post a pic later. Thanks for the reply though.
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Old January 11, 2013, 19:04   #4
falmouth308
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Mine is a folder! All I know were built as mine except for the fixed stock. PMs accepted. I have had mine 25+ years. Purchased for $225. I think yours will be a 1985 manufacture date.
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Old January 12, 2013, 01:53   #5
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OK, I'LL BITE

WHAT is a "Gwinn Bushmaster"? Pics?
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Old January 12, 2013, 09:30   #6
BlackgunCO
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It is a gas piston, rotating bolt like AR, with AR lower parts, takes AR mags semi auto carbine. I will post up pics of mine later. They came in different models. Early ones had top charging knob with aluminum upper and lower. Mine has wood furniture. Some had side folders. They also made a bullpup pistol in 556 called the Bushmaster Arm or something like that. Pre ban 1st made in early 70's and can be bought for $500-1000.
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Last edited by BlackgunCO; January 12, 2013 at 10:20.
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Old January 12, 2013, 13:04   #7
cotter
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Hurry and it can be yours! Just noticed this one today http://www.gunbroker.com/Auction/Vie...Item=325201094
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Old January 12, 2013, 13:36   #8
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Rather an odd looking duck isn't it? Not very pleasing to the eye, aesthetically speaking.
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Old January 12, 2013, 14:41   #9
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It is butt ugly at best. Not bad ergonomicly though. Reasonably accurate too.
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Old January 12, 2013, 15:57   #10
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Wow, far out man... never seen any of those around. Thanks for posting the pics, Black Gun. Always something new to be learned... Someone has some nice wood floors, too..
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Things fall apart; the centre cannot hold;
Mere anarchy is loosed upon the world,
The blood-dimmed tide is loosed, and everywhere
The ceremony of innocence is drowned;
The best lack all conviction, while the worst
Are full of passionate intensity.

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Old January 12, 2013, 20:47   #11
falmouth308
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There is normally a return-spring retainer located directly in front of your charging handle. I see from the picture that there appears to be a screw. This may be the retainer. This pictured weapon is older than mine. The receiver is one of the ĎArm Guní types on your rifle. Nice example.
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Old January 12, 2013, 23:01   #12
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While not the manual for your exact rifle, it is for the Gwinn Bushmaster bullpup rifle. It may help identify how to field strip it. Scroll down and look at the schematic and the instruction jus above it.

http://www.biggerhammer.net/armpistol/manual/
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Old January 12, 2013, 23:12   #13
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My Godfather bought one around 1995 that was a folding stock model that was done in Nickel electroplating for about $425. He sold it for about the same price a year later. I remember it was a good shooter. Kind of like the poor man's Galil. It had a folder like this:

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Old January 12, 2013, 23:32   #14
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Quote:
Originally Posted by Bubacus View Post
My Godfather bought one around 1995 that was a folding stock model that was done in Nickel electroplating for about $425. He sold it for about the same price a year later. I remember it was a good shooter. Kind of like the poor man's Galil. It had a folder like this:

It's got a bayonet lug too! That's actually kind of cool! Do these accept 30 round mags?? Are they 1/12 twist?
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Old January 13, 2013, 11:49   #15
falmouth308
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There is a problem with some 20 round magazines due to the lack of a channel to let the rivet on the front of the magazine to pass. 30s are good to go! BTW. This type of gas system, coupled with the 5.56X45, has a very heavy report. My weapon is the same black folder pictured above.
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