Couple bcg questions

[ikillsdeer]

I am starting to order parts to build my first ar, and my second lol and have 2 questions I need help with.

1. The toolcraft bcg on Monmouth website lists one for ar-15 but does not say what caliber it is so is it 556/223 or just 223 because they also have one listed as 556 for 50.00 more.

http://www.monmouthreloading.com/shop/ar15-toolcraft-nickel-boron-bcg/


http://www.monmouthreloading.com/shop/aero-precision-5-56-nickel-boron-bolt-carrier-group/


2nd question, they have a 6.8spc bcg, is that also good for 6.8spc ii ?


http://www.monmouthreloading.com/shop/toolcraft-6-8-spc-nickel-boron-bcg/

 

[timbgtm]

556-223-300 blackout all work for each caliber. The differences being how they're manufactured, put together and semi auto or full auto. Full auto doesn't mean you instantaneous have a machine gun, its just a heavier duty bolt designed for the m-16. Lots of variables and manufacturing short cuts.

 

[Plinker66]

And 6.8 and 6.8 II bcgs should be the same

 

[ikillsdeer]

556-223-300 blackout all work for each caliber. The differences being how they're manufactured, put together and semi auto or full auto. Full auto doesn't mean you instantaneous have a machine gun, its just a heavier duty bolt designed for the m-16. Lots of variables and manufacturing short cuts.

So this one that doesn' list a caliber size is for 223/556 ?

http://www.monmouthreloading.com/shop/ar15-toolcraft-nickel-boron-bcg/

 

[timbgtm]

So this one that doesn' list a caliber size is for 223/556 ?

http://www.monmouthreloading.com/shop/ar15-toolcraft-nickel-boron-bcg/

It says for m16, so your good to go!
AR15 Toolcraft Nickel Boron BCG is a M16 Full Auto BCG, manufactured using a 158 Carpenter steel bolt, and a 8620 steel carrier. T