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View Full Version : how do you fix play between upper and lower of an AR?


benbangui
10-29-2010, 10:11 PM
better aftermarket bolts? thanks in advance :)

paintballergb
10-29-2010, 10:14 PM
Accu-Wedge

https://www.midwayusa.com/viewproduct/?productnumber=698479

NiteQwill
10-29-2010, 10:45 PM
You don't. :)

Omega13device
10-29-2010, 10:46 PM
You don't. It's part of the design. If there weren't a little play, a lot of uppers and lowers wouldn't fit together.

$P-Ritch$
10-29-2010, 10:56 PM
+2 from the guys above. It is completely superficial and won't affect accuracy at all. A slight wobble is the norm.

Afterburnt
10-29-2010, 10:59 PM
Hit and miss I guess. Two out of my three are rock solid, no play what so ever. None of my stuff is matched.

BKTJ
10-29-2010, 11:11 PM
What brand upper and lower? How much play? Unless your weapon is jamming or has other malfunctions, run it. If it really bugs you get rid of it and buy another.
I don't like the Accuwedge, as it will sometime (rarely) shift and bind the weapon.It is the least expensive, however a better option is using the JP tension pin:
http://www.midwayusa.com/viewproduct/?productnumber=339281

B yond
10-29-2010, 11:33 PM
I used electrical tape.

http://www.calguns.net/calgunforum/showthread.php?t=357862

huckberry668
10-29-2010, 11:39 PM
you want it tight, put a couple of pieces of masking tape on both sides of the lower receiver walls just above the take down pin. Add tape till all play is gone. this will temporarily remove the play for more precision shooting.

Accuwedge is good but I found some lowers don't take it well. I had to cut the bottom of an wedge real thin to fit my Stag lower.

rrr70
10-29-2010, 11:47 PM
Why?

B yond
10-29-2010, 11:58 PM
Why?

Some of us don't like the rattle.

I don't think my AR should be noisy unless I'm shooting it.

Kerplow
10-30-2010, 12:18 AM
i hand picked my upper and lower so as to avoid the AR wobble.

rrr70
10-30-2010, 7:05 AM
Does play affect accuracy?

Bentot
10-30-2010, 7:21 AM
Does play affect accuracy?
For combat use, no it doesn't. For competition and bench shooting .......well....maybe. Most people like to squezee every bit of accuracy available. I have a Stag 16" upper and Stag lower and there is a very noticeable play.

If I shoot an 8" group at 50 yards rapid fire 10 rounds iron sights, that's fine for me.

benbangui
10-30-2010, 10:41 AM
thanks everyone! :)

its simply that i dont like play in my firearms. i like everything to be tight and solid. if it HAS to have play i guess i would leave it. but you guys gave me some nice sugjestions to fix it. thanks :)

bomb_on_bus
10-30-2010, 11:01 AM
I think you asking about the take down pins when you are referring to bolts?

The accuwedge is a temporary fix that will get rid of play but some people have said that this play will actually get worse over time meaning that the holes will become more oblong due to the upwards pressure the wedge puts on the upper receiver.

Some outfits offer matched uppers and lowers to aliviate this.

Also JP offers a tensioning pin that takes out the play as well

http://www.midwayusa.com/viewproduct/?productnumber=339281

XDRoX
10-30-2010, 11:03 AM
I bought one of these (http://www.parallaxtactical.com/store/ar-15-buffer-wedge-186.html) for $1.99:
http://www.parallaxtactical.com/store/images/rb-a005-m.jpg

BigBamBoo
10-30-2010, 11:24 AM
.......

Wicked K5
10-30-2010, 3:48 PM
Here's my $1.09 remedy. I call it the F.AR.T.S system...

http://www.calguns.net/calgunforum/showthread.php?t=339937

HKROB
10-31-2010, 10:19 AM
better aftermarket bolts? thanks in advance :)

I have used Armalite national match take down pins to solve this problem.

http://www.armalite.com/ItemForm.aspx?item=ENM002&Category=5e96660f-cc85-4db9-ab9d-8a3c238a7007

HKROB
10-31-2010, 10:22 AM
What brand upper and lower? How much play? Unless your weapon is jamming or has other malfunctions, run it. If it really bugs you get rid of it and buy another.
I don't like the Accuwedge, as it will sometime (rarely) shift and bind the weapon.It is the least expensive, however a better option is using the JP tension pin:
http://www.midwayusa.com/viewproduct/?productnumber=339281

The JP pin works very good but its a pain in the ***** to break down the rifle when using that style of pin (tools required) .

digitalelf
10-31-2010, 6:30 PM
You can also use a $.29 black rubber o-ring from any hardware store...

I know, just a band-aid, but it worked for the wobble in mine (plus it didn't seem to give the really insane tension that the "acu-wedge" gave)...

TKM
10-31-2010, 6:38 PM
You don't.

Stop looking for problems that don't exist. Fix the ones that do.

evolixsurf
10-31-2010, 8:05 PM
i have an accuwedge ill send to you for $5. I dont need it.

halon101
10-31-2010, 8:16 PM
just use an earplug under the rear take down pin. the soft foam ones.
people dissagree with the need for one of these but its clear. any movement will create small changes in the muzzle and the impact of the bullet will change. we are talking small.
its kinda close to the idea of glass bedding a bolt gun.

Adehtla
10-31-2010, 8:22 PM
+1 for the AccuWedge.