Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
BCM
Member Login

Posted: 12/31/2020 2:15:40 PM EST
I have a pre-ban Olympic (1993), and I only have two 40rd and one 30rd that will seat properly. Did the tolerances change on the lowers or the mags between then and now? The only mags that fit have no markings but look like old military/colt brand, the mags that don't work are C products and B.F.I. I've tried H&H, and "Thermold" without success. I can see a difference between the ones that work and don't work. The "stop" on the side, and the notch at the top back of the mags are higher. I  know this is a rookie question but has there been a change?
Link Posted: 12/31/2020 2:19:01 PM EST
Dimensions for a lower and the dimensions for a mag have had zero changes between then and now.  Something is wrong with your specific gun.
Link Posted: 12/31/2020 2:20:56 PM EST
Originally Posted By mckeeg1:
I have a pre-ban Olympic (1993), and I only have two 40rd and one 30rd that will seat properly. Did the tolerances change on the lowers or the mags between then and now? The only mags that fit have no markings but look like old military/colt brand, the mags that don't work are C products and B.F.I. I've tried H&H, and "Thermold" without success. I can see a difference between the ones that work and don't work. The "stop" on the side, and the notch at the top back of the mags are higher. I  know this is a rookie question but has there been a change?
View Quote
10 year badge. First post . . . thats got to be some kind of a record.
Link Posted: 12/31/2020 2:23:53 PM EST
Try a Magpul or OKAY surefeed magazine.
If those don't seat right, try unscrewing the magazine catch one full turn, that might do the trick.
Link Posted: 12/31/2020 2:49:49 PM EST
Could be out of spec lower.  Oly didn't have the best qc out there.
Link Posted: 12/31/2020 2:52:58 PM EST
[Last Edit: 12/31/2020 2:53:11 PM EST by Bigger_Hammer]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By ruger556boy:
Could be out of spec lower.  Oly didn't have the best qc out there.
View Quote



Try using Good Quality "Gold Standard" magazines (MagPul, or USGI mags)

Could be that old Oly Receiver (as mentioned - not exactly "Tier 1")

Could be a bad magazine catch or mag catch is not property installed.

Shouldn't be rocket science to figure out what the problem is.
Link Posted: 12/31/2020 3:00:24 PM EST
Try some quality USGI mags.
If you still have issues then the Oly lower is the problem
Link Posted: 12/31/2020 3:05:05 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Bigger_Hammer:



Try using Good Quality "Gold Standard" magazines (MagPul, or USGI mags)

Could be that old Oly Receiver (as mentioned - not exactly "Tier 1")

Could be a bad magazine catch or mag catch is not property installed.

Shouldn't be rocket science to figure out what the problem is.
View Quote



What he said.



Also, did you go out and find a thermold to try or is that something you did before? Random lol
Link Posted: 12/31/2020 3:21:49 PM EST
That was the only brand that the store had. I took an empty, good mag to compare and it looked like it would fit. Returning it tomorrow.
Link Posted: 12/31/2020 3:26:51 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Rhodie1111:
Dimensions for a lower and the dimensions for a mag have had zero changes between then and now.  Something is wrong with your specific gun.
View Quote

FPNI
Link Posted: 12/31/2020 6:21:23 PM EST
When you buy some new magazines,  does the magazine fit in your Oly lower when empty and the bolt is closed? If so what should try down loading 25 rounds into a 30 round magazine and see it will latch on a closed bolt. Different ARs possibly have slightly different mag well dimensions.
Link Posted: 12/31/2020 6:37:02 PM EST
Olympic had an issue once with their broaching tool wearing out. A bunch of lowered were made with out of spec mag wells. Mostly too narrow for anything other than Colt spec military mags.

I have one Colt A2 similar. Can’t for a PMag in it.
Link Posted: 12/31/2020 6:38:13 PM EST
A friend of mine has an Olympic lower with the same issue. Out of a couple dz mags, I think he has maybe 2 that actually seat as intended and none drop free. He's got to wrestle them out with force.

Trying to get him to dump it.
Link Posted: 12/31/2020 11:50:54 PM EST
[Last Edit: 1/20/2021 10:07:27 PM EST by j3_]
Getting ready to change into someone more comfortable. Name changes coming.
Link Posted: 1/1/2021 3:48:14 PM EST
Olympic was well known back in the days to not be the best quality. My suggestion is to buy a complete lower from a better known manufacturer. After all, you get what you pay for.
Link Posted: 1/1/2021 9:52:30 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By T18B40:
Olympic was well known back in the days to not be the best quality. My suggestion is to buy a complete lower from a better known manufacturer. After all, you get what you pay for.
View Quote

This here. Try a magpul pmag or okay surefeed. If one of those don’t work, then replace the lower.
Link Posted: 1/1/2021 10:22:26 PM EST
Ditch that lower and buy a new one.
Link Posted: 1/1/2021 10:22:29 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By T18B40:
Olympic was well known back in the days to not be the best quality. My suggestion is to buy a complete lower from a better known manufacturer. After all, you get what you pay for.
View Quote


This.  Olympic was known for putting out a lot of out of spec forged or cast lowers that broke through the rear takedown lugs.

The suggestion of replacing it with a current production lower from a quality manufacturer seems like a reasonable way to go to me.  Keep the Oly in long term storage as an emergency backup.


Link Posted: 1/2/2021 10:04:29 AM EST
Link Posted: 1/3/2021 6:43:43 PM EST
Based on the OPs location, I would say put that lower (or the whole gun) up for sale on NE Shooters for a reasonable price and never look back.  You will do someone a favor in a ban state and end up with a better rifle for your money as you should be able to do a substantial upgrade.
Link Posted: 1/3/2021 6:49:38 PM EST
sounds like that lower could be a pcc candidate.

Maybe a 9mm mag block and use it to host a 9mm upper?

Could be worth a shot rather than shelve it.
Link Posted: 1/3/2021 6:53:50 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Rigian:
10 year badge. First post . . . thats got to be some kind of a record.
View Quote

Link Posted: 1/3/2021 7:01:16 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By bfoosh06:
At the very least try a different mag catch. Yours might be out of spec.
View Quote

Yeah or maybe shave a little off the top of the mag catch and see if it'll go.
Link Posted: 1/23/2021 12:18:00 PM EST
[Last Edit: 1/23/2021 12:18:18 PM EST by lostnswv]
Buy a new stripped lower.
Link Posted: 1/30/2021 8:22:22 PM EST
My only experience with Olympic was the badly undersized mag well on the specimens I looked at at a Las Vegas gunshow many years ago.
Link Posted: 2/7/2021 11:37:38 AM EST
It’s your lower not the magazines.
Link Posted: 2/7/2021 11:42:55 AM EST
I have a DPMS lower that is like this, absolutely hates PMAGS and Okay ind./D&H Mags. I've had luck with Lancers, Tapco, Thermold, and Troy
Link Posted: 2/7/2021 11:52:08 AM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By nawdude:
sounds like that lower could be a pcc candidate.

Maybe a 9mm mag block and use it to host a 9mm upper?

Could be worth a shot rather than shelve it.
View Quote

Replace the lower and look into this idea, or else sell the lower to the one or two remaining ban states.
Link Posted: 2/7/2021 11:59:09 AM EST
You can also go to a machine shop that has experience with AR's and re machine the inside and it will shave off any points that are out of tolerance  
I have.a Sendra M16A1 that looks like that is what the previous owner did
Link Posted: 2/7/2021 12:00:15 PM EST
If you’re good with a file you can draw file a magwell.
Link Posted: 2/9/2021 6:54:33 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Rigian:
10 year badge. First post . . . thats got to be some kind of a record.
View Quote



LMAO
Link Posted: 2/9/2021 8:38:05 PM EST
[Last Edit: 2/9/2021 8:38:30 PM EST by GySgt_D]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By samuse:
If you’re good with a file you can draw file a magwell.
View Quote



I've done that before.  Didn't take much effort.  Or time.

It was done to two lowers from a fly-by-night local company that I've never heard of before or since.  Purchased during a previous panic, and I felt very fortunate to be able to get them.

Link Posted: 2/9/2021 11:48:48 PM EST
If you're talking about the SGW stop sign, I have one. It was made in late 1992 and I bought it in '98 as a new stripped lower. It's forged and the fit and finish is perfect except the wagwell is a little tight. I only used Colt and Okay ind. mags as they were the only ones that I found would drop freely. If I remember correctly, Magpul will also. I've been using it with a Tac Sol 22lr upper for awhile now and it runs perfectly.
Link Posted: 2/10/2021 12:35:19 AM EST
I have a pre-ban Olympic (1993)
View Quote
May as well have a blue oval on the grill.
Link Posted: 2/10/2021 6:31:21 AM EST
Take the upper off the lower.

Insert (to lock in) the mags that fit and the mags that don't fit to see if the ones that don't stick up too high (probably a receiver issue).

Or if they still won't lock in (mag. catch issue).

Do the mags. lock in empty?  But not when full?  Maybe they require a more forceful seating effort.

I have a rifle (not and AR15) that uses AR15 magazines.  Some AR magazines will not lock in, some will.  I went through a box till I got 10 that would lock in and just put them with the rifle in the mag. pouches on the case.
Link Posted: 2/11/2021 11:34:25 AM EST
[Last Edit: 2/11/2021 11:35:20 AM EST by Combat_Diver]
I had an older Oly/SGW stop sign lower I got back in 87'  Thing never worked with Theramold magazines I had at the time.  Tight magwell but ran fine with USGI 20/30s which for some reason never in short supply for me.


CD
Link Posted: 2/13/2021 8:12:36 AM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Metzger31:
I have a DPMS lower that is like this, absolutely hates PMAGS and Okay ind./D&H Mags. I've had luck with Lancers, Tapco, Thermold, and Troy
View Quote

Those first three are about all I have.  I think I'd be ditching lowers.

Top Top