Just mounted a KAC RAS and vertical grip on my Colt. It's a beautiful thing, but it made me notice some slight play between the upper/lower. Given I am always trying to tighten up the platform, this had me worried.
I received two opinions; one said that it was lousy machining by Colt and to get an "Accuwedge" to tighten it up. The second opinion was from a military armorer who said almost all Colts have that slight movement- don't screw with it or use the Accuwedge because it will bind the bolt and cause jams. The short-version reason this armorer gave for the "play" is that a good automatic weapon has a "measured amount".
Lot's of people trust this armorer with their life, so I am currently going with "armorer for $200.00, Monty".
But given there is generous experience and opinions, I would love to hear from the other experts.....
M4/AR Upper/Lower "play"
M4/AR Upper/Lower "play"
If you want to be successful at anything, you'll need to develop a never quit attitude. Don't let life happen to you. Grab it by the throat and make life dance to your tune.
Ranger KW Driver
Ranger KW Driver
- Flesh Thorn
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Re: M4/AR Upper/Lower "play"
I would go with the Accuwedge and if it causes any problem just remove it. Seriously, I don't see how using an Accuwedge could "bind the bolt and cause jams". Sounds like complete bs to me.
A Co. 3/75 Ranger Regt. HQ Section Dec 85-June 86.
HSC USAITC June 86-April 88
NAVSEA, 2014 to Present
Psalm 144:1 A Psalm of David. Blessed be the LORD my strength, which teacheth my hands to war, and my fingers to fight:
HSC USAITC June 86-April 88
NAVSEA, 2014 to Present
Psalm 144:1 A Psalm of David. Blessed be the LORD my strength, which teacheth my hands to war, and my fingers to fight:
Re: M4/AR Upper/Lower "play"
Hey thanks. I really didn't get his point and thought there was something I was missing. He went into this whole (pretty logical) explanation to justify the play.Flesh Thorn wrote:I would go with the Accuwedge and if it causes any problem just remove it. Seriously, I don't see how using an Accuwedge could "bind the bolt and cause jams". Sounds like complete bs to me.
Even though I was USAF, as a 2A3x3 well fitting parts and gaskets were pretty important and logical. So I just could not get this straight in my mind.
If you want to be successful at anything, you'll need to develop a never quit attitude. Don't let life happen to you. Grab it by the throat and make life dance to your tune.
Ranger KW Driver
Ranger KW Driver
Re: M4/AR Upper/Lower "play"
Works fine on mine, but needed a little tweaking to fit just right. No bolt binding or jams caused by accuwedge to report.
HHC 2/75 (1998- 2000)
Duty a mountain; Death a feather.
One of these days I'll start off slow...
Duty a mountain; Death a feather.
One of these days I'll start off slow...
- Flesh Thorn
- Ranger
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Re: M4/AR Upper/Lower "play"
Another solution, but more $$$: http://www.midwayusa.com/viewproduct/?p ... ber=339281" onclick="window.open(this.href);return false;
An article on the AccuWedge : http://www.fulton-armory.com/AccuWedge.html" onclick="window.open(this.href);return false;
An article on the AccuWedge : http://www.fulton-armory.com/AccuWedge.html" onclick="window.open(this.href);return false;
A Co. 3/75 Ranger Regt. HQ Section Dec 85-June 86.
HSC USAITC June 86-April 88
NAVSEA, 2014 to Present
Psalm 144:1 A Psalm of David. Blessed be the LORD my strength, which teacheth my hands to war, and my fingers to fight:
HSC USAITC June 86-April 88
NAVSEA, 2014 to Present
Psalm 144:1 A Psalm of David. Blessed be the LORD my strength, which teacheth my hands to war, and my fingers to fight:
Re: M4/AR Upper/Lower "play"
Thanks for everything.
I would seriously like to call up Colt and give them a piece of my mind. I was considering other alternatives and almost pulled the trigger on a KAC SR15- but decided to go with the real deal. This type of crap just pisses me off- there is no excuse for poor machining on a weapon that our military uses every day.
I would seriously like to call up Colt and give them a piece of my mind. I was considering other alternatives and almost pulled the trigger on a KAC SR15- but decided to go with the real deal. This type of crap just pisses me off- there is no excuse for poor machining on a weapon that our military uses every day.
If you want to be successful at anything, you'll need to develop a never quit attitude. Don't let life happen to you. Grab it by the throat and make life dance to your tune.
Ranger KW Driver
Ranger KW Driver
Re: M4/AR Upper/Lower "play"
Accuwedge. Your weapon would allready be jamming if it was going to jam from the upper/lower slop. The slop is very common, hence someone coming up with the accuwedge. You could also remove your pistol grip and drill and tap a set screw that would come into contact with the rear takedown pin boss. Hope this helps.
B. Co. 3/75 92-94
Wpns Plt.
RS 10/93
-Only dead fish follow the stream-
Wpns Plt.
RS 10/93
-Only dead fish follow the stream-
Re: M4/AR Upper/Lower "play"
Three words............"Rock River Arms"
1st Ranger Bn 86-92, C Co, HHC, Bn COLT, RHQ 94-95 Ranger Class 14-87 MFF 05 May 88
"Life is like a drop zone, sometimes you just miss the whole damn thing!"
"Life is like a drop zone, sometimes you just miss the whole damn thing!"
- Flesh Thorn
- Ranger
- Posts: 5596
- Joined: March 5th, 2003, 2:12 pm
Re: M4/AR Upper/Lower "play"
I can give a thumbs up for Double Star.
A Co. 3/75 Ranger Regt. HQ Section Dec 85-June 86.
HSC USAITC June 86-April 88
NAVSEA, 2014 to Present
Psalm 144:1 A Psalm of David. Blessed be the LORD my strength, which teacheth my hands to war, and my fingers to fight:
HSC USAITC June 86-April 88
NAVSEA, 2014 to Present
Psalm 144:1 A Psalm of David. Blessed be the LORD my strength, which teacheth my hands to war, and my fingers to fight:
- Parabellum
- Ranger
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- Joined: February 25th, 2004, 5:32 pm
Re: M4/AR Upper/Lower "play"
I have used an Accu Wedge for years, personal and combat. They work great!
"We spoke to them in the only language they understood - the machine gun."
HHC 1/75 Oct 98-Mar 99
B co 1/75 Mar 99-Apr 04
ROC RSTB RIP/PRC Cadre Apr 04-May 06
A co 1/75 May 06-Jul 08
HHC 1/75 Jul 08-Mar 09
RS 3-99
HHC 1/75 Oct 98-Mar 99
B co 1/75 Mar 99-Apr 04
ROC RSTB RIP/PRC Cadre Apr 04-May 06
A co 1/75 May 06-Jul 08
HHC 1/75 Jul 08-Mar 09
RS 3-99
Re: M4/AR Upper/Lower "play"
Thanks again for all the suggestions.
I finally got the Accu wedge yesterday for my Colt. I had to press down tight to get the takedown pin in and almost thought it wouldn't close. But perseverance and all that got it closed. Solid fit and I put about 90 rounds through it- no problems.
I have to also say, I like the idea of a tension screw. That is simply one of those smart suggestions that only an experienced operator or machinist would make (or incorporate into the weapon).
By the way, I am going to collect $50 bucks from the armorer. He bet me somewhere in the second clip I would feel a difference/issue in the action. Loser.
I finally got the Accu wedge yesterday for my Colt. I had to press down tight to get the takedown pin in and almost thought it wouldn't close. But perseverance and all that got it closed. Solid fit and I put about 90 rounds through it- no problems.
I have to also say, I like the idea of a tension screw. That is simply one of those smart suggestions that only an experienced operator or machinist would make (or incorporate into the weapon).
By the way, I am going to collect $50 bucks from the armorer. He bet me somewhere in the second clip I would feel a difference/issue in the action. Loser.
If you want to be successful at anything, you'll need to develop a never quit attitude. Don't let life happen to you. Grab it by the throat and make life dance to your tune.
Ranger KW Driver
Ranger KW Driver