Difference between these BCGs

[warpig]

Got a question for the gang. What is the difference between the 2 Bolt Carriers below? The one on top has a larger opening than the one in the bottom

 

[noxin]

oooh, I know!

the top is semi-auto/ar-15

The bottom is full-auto/m-16 rated.

You can tell because the m-16 is longer/stronger on the right hand side of your picture.

They're both good for an AR-15

 

[W.E.C]

winner, winner chicken dinner.

 

[warpig]

crazy fast turnaround. thank you!

 

[noxin]

I just happened to refresh and did some research on this recently as I just got into AR building.

 

[warpig]

just putting together my first! its a whole new world.

 

[Almostelmo]

They both look busted. Send them to me and I'll dispose of them properly for you, free of charge!

 

[warpig]

They both look busted. Send them to me and I'll dispose of them properly for you, free of charge!

Is this still the final piece to your AR puzzle?

 

[Almostelmo]

Is this still the final piece to your AR puzzle?

Haha nope, I picked up one of the phase 5 carriers before they jacked their prices. I'm waiting on a barrel.

 

[jrobie79]

I need a BCG

 

[crazymjb]

Its not strength, the forward portion that is missing from the semi-auto one normally trips the f/a sear when the bolt goes back into battery.

Mike

Sent from my SAMSUNG-SGH-I727 using Tapatalk 2

 

[Romokid]

Its not strength, the forward portion that is missing from the semi-auto one normally trips the f/a sear when the bolt goes back into battery.

Mike

Sent from my SAMSUNG-SGH-I727 using Tapatalk 2

^^This. A lot of people run them in AR15's for the additional weight, but I think if you just use a heavier buffer with the semi BCG it would be more effective than the weight differential of the auto vs semi.