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Posted: 4/27/2011 6:51:15 AM EDT
| I have a M&P bcg and a colt upper reciever. Will the M&P function correctly and safely in the colt upper? Sorry if its a dumb question, fairly new to all this. Thanks |
| If you have new parts or parts with relatively few miles on them then there is no need to check head space. It won't hurt anything if you do, however. Generally there is no problem swapping parts as long as they are in spec which you will find out in short order. Enjoy. |
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You should be well served with an H buffer.
Quoted:
I have a question. I am kinda new to all of this too. If I have a F/A bcg, do I need a heavier buffer? It is installed in a 16" car with a mid length gas system. The best option for checking headspace is the 5.56 NATO FIELD gage made by Bill Ricca: http://www.billricca.com/collectors_corner.htm About a quarter of the way down the page, its noted as "M16 Maximum Headspace Gage" |
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Out of the millions of civilian AR-15s and the millions of military M-16s there are only a hand full of accounts of "supposed" headspace issues. Unless you have several thousand rounds on that BCG you are nowhere close to having a headspace issue. I garantee your bolt lugs will break before you ever get to that point! In the military bolts get swapped all of the time during batch cleaning. I've never seen a M-16 upper or bolt with matching numbers. If it were an issue they would be marked like a bolt action rifle.han What part of tight tolerance and total interchangiblity are we missing. The only issue arises with a chamber being improperly reamed (which is quite rare). That is what the headspace gage is for, not the bolt. Never heard of a Colt chamber being out of spec from the factory. After millions of uppers produced you'd think they'd have it right. Ever hear of a bad Colt, Spikes Tactical, Sabre, BCM or FNMI? |
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Quoted:
I have a question. I am kinda new to all of this too. If I have a F/A bcg, do I need a heavier buffer? It is installed in a 16" car with a mid length gas system. Check your PM's (upper left) Heavier than what ? What ammo ? There is a combination of elements that determine the best buffer for your particular rig. Sorry about the hijack, OP. |
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