BCL 102 stripped receiver set thread

Updated the parts list on Post #2

Pretty much depending on what Gen or Day your BCL was built fitting might be required... lol...
 
DILLIGAF said:
pin play should be .002 if I remember correctly. I will get Ramy to machine my holes out to the DPMS pin size so that way it will be a perfect fit.
Click to expand...

Thanks for that!

I have two receiver sets coming, so I may encounter these things. I want a plan in advance. But I'll need to pull some measurements from some other rifles to see if that info holds true.

Think this weekend might investigate deeper to the differences between the Brownells BCG and the BCL BCG, to see if I can find the cause of light primer strikes. Light Snow and relatively cool, so should be also able to hit the range without it being too busy.
 
DILLIGAF said:
Its called ; figure it out on your own :)

So Far Gen 1 is the only one that takes everything without fitting. All my parts I used had zero fitment issues.

I have a warrenty claim in for the take down pins. They are so loose its not funny. I have DPMS ones on order from Brownells but they are B/O

The holes on my BCL 102 are all over the place. Ill drill them all to .275 and install new pins if the crap BCL send me doesn't fix the issue.

Front lower hole .2495
Rear lower hole .248
Both upper holes .250

Both pins are .2415

29354765_10156344011578552_5747154362321409792_o.jpg
Click to expand...

So the pins are some weird proprietary size. The pins are as thick as regular AR15 pins but longer so regular AR10/LR308 pins won't work without expanding the holes on the receiver...great. Thanks for the measurements Dilli.
 
xeelee said:
So the pins are some weird proprietary size. The pins are as thick as regular AR15 pins but longer so regular AR10/LR308 pins won't work without expanding the holes on the receiver...great. Thanks for the measurements Dilli.
Click to expand...

That doesn’t sound very good!! I guess I will evaluate when I get the receivers in hand and take my own measurements. Most likely I’ll just make my own pins.
 
DILLIGAF said:
Nope they should be .250 like every AR pin. BCL has yet to respond to my emails... lol...
Click to expand...

Gotcha, I guess my dilemma is where to source the appropriately sized pivot/takedown pins from anyone other BCL (I don’t want to use ANY of their parts for my stripped receiver) Before you posted your measurements I just assumed they were using LR308 pins (.276 diameter) but now I see they are using .250 diameter pins or attempting to based on your measurements lol. So who makes .250 diameter pins of appropriate length to accomodate the wider magwell on a 308 sized rifle? Can’t recall how many times I’ve email BCL about this with no effing response. Gonna email Armalite and ask what diameter their AR-10 pivot/takedown pins are and post back what they say unless someone here already knows the answer...
 
Last edited:
xeelee said:
Gotcha, I guess my dilemma is where to source the appropriately sized pins from anyone other BCL (I don’t want to use ANY of their parts for my stripped receiver) Before you posted your measurements I just assumed they were using LR308 pins (.276 diameter) but now I see they are using .250 diameter pins or attempting to based on your measurements lol. So who makes .250 diameter pins of appropriate length for a 308 rifle? Can’t recall how many times I’ve email BCL about this with no effing response. Gonna email Armalite and ask what diameter their AR-10 pivot/takedown pins are and post back what they say unless someone here already knows the answer...
Click to expand...

ArmaLite AR-10 front take down pin, 0.273
ArmaLite AR-10 rear take down pin, 0.273
This was just measured on mine.

Hope this helps

PM
 
SSG69 said:
ArmaLite AR-10 front take down pin, 0.273
ArmaLite AR-10 rear take down pin, 0.273
This was just measured on mine.

Hope this helps

PM
Click to expand...

Thanks for that! That seems to confirm what I have been reading. For all intents and purposes most LR308/AR10 rifles use same sized pins. As to why BCL would choose to use
different sized pins is beyond me. Maybe this is a new feature? Makes disassembly more high-speed low drag like a North American Mountain Lion
 
Last edited:
I measured my Gen 1 pins and holes with some pin gauges and calipers

Upper .250 both holes

Lower front hole .249
Lower Rear hole .248

Front pin .241
Rear Pin .241
 
Last edited:
Shooter1971 said:
I measured my Gen 1 pins and holes with some pin gauges and calipers

Upper .250 both holes

Lower front hole .249
Lower Rear hole .248

Front pin .241
Rear Pin .241
Click to expand...

So both yours and Dili’s are .241...looking like it is some weird proprietary size. That or they are supposed to be .250 and typical BCL QC. Either way it’s looking like you need to get pins from them (who knows how since they don’t seem to reply to inquiries) or you have ream out the receivers to use anything aftermarket.

Also, I don’t remember reading anywhere that pivot/takedown pins would be included with the stripped receivers. Emailing BCL to ask is useless. Will have to msg SFRC to see if they can find out.
 
Last edited:
xeelee said:
Thanks for that! That seems to confirm what I have been reading. For all intents and purposes most LR308/AR10 rifles use same sized pins. As to why BCL would choose to use
different sized pins is beyond me. Maybe this is a new feature? Makes disassembly more high-speed low drag like a North American Mountain Lion
Click to expand...

That's one of the reasons it got NR status (IMO), it cannot take Standard AR10 Upper receivers.
 
You must log in or register to reply here.
Back
Top Bottom