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Flowmini98
05-26-2012, 6:04 PM
Both are AR15s heres whats going on..what am I missing?


Gun#1: AeroP lower, PSA LPK, 16" free float hand guard upper w/ full auto BCG
When I pull back on charging handle (no mag in magwell, no round in the chamber) the dust cover pops open and the BCG of course pulls back but doesnt stay in the rearward position unless I pull out on the bolt catch lever

Gun#2: AeroP lower, Spikes LPK, 16" AeroP upper

When I pull back on the charging handle the BCG pulls back and stays back without touching the bolt catch lever but I then have to manually push the charge handle back into position.


Which of these guns is working in the correct manner? I have no other AR experience to compare them too.

S470FM
05-26-2012, 6:12 PM
gun #1 is working correctly.
gun #2 might have issues with buffer assembly. maybe others can chime in

arsilva32
05-26-2012, 6:12 PM
with no mag in it wont stay back



the mag is what activates the bolt hold stop,was a mag inserted in the second rifle? if yes its working as designed ,if no then there is a problem with the catch assy

pontiacpratt
05-26-2012, 6:17 PM
#2 no buffer spring?

Revolver Ocelot
05-26-2012, 6:23 PM
#2 no buffer spring?

HAha. I did this on my first AR asembly. Thought i was ready to roll after putting everything together, pull the charging handle back and nothing.

Live and learn. :)

G-forceJunkie
05-26-2012, 6:24 PM
Something is wrong with #2. What is holding the BCG back, is the catch engaging, or is the carrier binding up in the buffer tube?

Solidux
05-26-2012, 7:14 PM
#1 is fine
#2 do you remember putting a spring in the buffer tube? If you did. Take off the lower and manually push the buffer in to see if it pushes out. A dead rat might be in the tube or something. It also sounds normal if you had a magazine in the well. Show us pictures or youtube a little video of #2.

Redchevyman
05-26-2012, 7:17 PM
Does #2 have a magazine in it? If it does not than it sounds like no buffer spring.

Solidux
05-26-2012, 7:24 PM
I wouldnt fire both your rifles until youve had someone look through them to make sure you put everything together right. Examples of common mistakes are backwards trigger spring, missing buffer in bolt catch assembly, wrong springs everywhere or lack of springs where one should be. Oh... and bullet button. Put that on before you even think about connecting the receivers

S470FM
05-26-2012, 7:51 PM
#1 is GTG, #2 needs a little help.

Flowmini98
05-26-2012, 11:35 PM
Update:
gun #1 has about 400 rounds through it so far with only 5-6 FTE.
gun #2 i just put together 3 days ago

BUT..
Just for piece of mind i pulled the uppers off both guns and checked over assembly and compared to pics/youtube vids. Lower assembly is correct on both guns. Made sure the buffer springs are in place and working. I re-installed both uppers onto lowers then inserted an empty Pmag into each one, and pulled back on charge handle:

BCG moves to the rear and stays in place without touching bolt catch lever. I then can slide the charge handle forward manually and when bolt catch lever is pressed the BCG all slides forward.
This is the same for both guns now. All seems well to me.

tanakasan
05-27-2012, 7:53 AM
#2-no mag, BCG should not stay back and should touch the bolt catch if operated manually. Does your buffer tube have a dent or other (out of round) damage to it? Buffer retainer adjusted too tall? Grip screw too long?

Robert

CIV Tactical
05-27-2012, 8:41 AM
Update:
gun #1 has about 400 rounds through it so far with only 5-6 FTE.
gun #2 i just put together 3 days ago

BUT..
Just for piece of mind i pulled the uppers off both guns and checked over assembly and compared to pics/youtube vids. Lower assembly is correct on both guns. Made sure the buffer springs are in place and working. I re-installed both uppers onto lowers then inserted an empty Pmag into each one, and pulled back on charge handle:

BCG moves to the rear and stays in place without touching bolt catch lever. I then can slide the charge handle forward manually and when bolt catch lever is pressed the BCG all slides forward.
This is the same for both guns now. All seems well to me.

you should be ok. remember you need a empty mag in the magwell to engage the bolt catch, the mag follower pushes the catch into position when the mag is empty. as far as gun #2 goes sounds like you just need to lube it up a lil and break it in. charging handles can be rough on new guns and can bind. when you charge your bolt make sure you CHARGE it, dont ride it back and expect it to slam into battery. remember when your shooting that bolt carrier is pushing into the buffer tube and stripping new rounds into battery with way more force than you could ever apply on the charge handle by hand. good luck my friend

cmace22
05-27-2012, 10:29 AM
400 rounds with 5-6 FTE! I think someone should take a look at your rifles.

Flowmini98
05-27-2012, 11:27 AM
400 rounds with 5-6 FTE! I think someone should take a look at your rifles.

Let me clarify this...Took my rifle to the range to shoot after giving its first thorough cleaning, had a few rounds get jammed and narrowed it down to having oiled too much ( which I didnt think was possible). Once i wiped some oil off of it, the gun shot fine.