AR-15 Question
I have a complete ar-15 i read on another post that you cant change the caliber if it was stamped 5.56 on the lower. Whats the deal with that? I might want to change to 9 mm or 50 cal. In my state these guns are legal. What are the fed laws? Thanks David
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I have a ar-15 pistol upper[flat top] . I also have a A2 bushmaster heavy brrl upper[carry hndl] . Can i switch the 2 uppers so my rifle is a flat top . My friend said you cant because of the lack of feed ramps in the pistol upper . Is this true ?? 0 -
There are several variables involved here. Putting a barrel with M4 type feed cuts on an upper w/o corresponding cuts is not a problem but putting a noncut barrel on an upper with the feed cuts is bad. The parts themselves should fit together w/o issue. 0 -
Rather than consult a friend, you need to consult the gunsmith who will R&R the barrels for you.
Depending upon what you actually have, & the skill of whoever assembled the uppers, you may or may not be able to use them.
Neal
EDIT: Dude, am I confused? My understanding is that you want to have your gunsmith remove the barrel & bolt from both uppers, & switch them; then, you want to install the pistol upper, which will now have the rifle barrel & bolt, onto your lower. Is that right?
EDIT: Dude, now I'm really confused; are you saying that your pistol upper currently has a barrel at least 16" long? If not, then the rest of us on this forum have a failure to communicate.0 -
Let me point out that putting a pistol length upper onto a rifle lower (stock present or NOT) creates what's known as a "short barreled rifle" and without the appropriate Federal paperwork and fee-paying, is a BIG Federal "no-no".
Assuming such a short-barreled rifle were legal in your jurisdiction (its not in every state) and you were hunky-dory with the paperwork, fees, and waiting time, I think the answer is that you should be able to physically do the switch pretty easily.
The real question is whether or not your new creation would actually function reliably after doing this. Rather than try to guess, I think it would be pretty simple to do the empirical test.
In fact, you might just test to see if you could manually cycle dummy rounds through the hybrid gun. While the converse isn't necessarily true, if it won't work with dummy rounds, it definitely won't work with live ones.0 -
Yes as long as you abide by all applicable laws.
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Just changing the uppers only .. I did talk to a gunsmith today and there are no laws prohibiting me from doing it . And yes there is a diff. in the uppers . A rifle has feed ramps pistols dont . He said with a lil bit of grinding and polishing all should be well with the changing of the uppers . 0 -
I agree with Beantown if you do that you create a short barreled rifle because the lower is a rifle lower. The barrel must be 16 inch's or longer.
Ask your gunsmith what he knows about SBR's.
Dont let the gunsmithe grind on your pistol upper. If it shoots fine as it is it needs nothing. There is nothing about the rifle lower that has anything at all to do with feed ramps.
If the barrel extension on the pistol upper does not have ramps then the upper receiver does not need them.
In a semi I have never seen the need for M4 style feed ramps. All they seem to do to me is bugger up the brass.0 -
I thought camodude just wanted to swap out the uppers so the flat top will have the heavy barrel to comply with the "law". Like it's been mentioned if the cuts will fit then I don't see why not. Personally I'd rather just buy/build a third upper to your spec. figuring the cost of the gunsmith's time might be the same for a new upper. 0 -
Yeah I guess it depends on if he wants to swap barrels between uppers or uppers on the rifle.
At any rate an unramped upper will work with a ramped barrel extension, OTH a ramped upper will not work with a unramped barrel extension.
Usually flat tops have ramps and A2 style uppers don't. The opposite of his description.0 -
quote:Originally posted by camodude
Just changing the uppers only .. I did talk to a gunsmith today and there are no laws prohibiting me from doing it . And yes there is a diff. in the uppers . A rifle has feed ramps pistols dont . He said with a lil bit of grinding and polishing all should be well with the changing of the uppers .
GET A NEW GUNSMITH NOW. There is NO difference between pistol and rifle other then barrel length (assuming they are the same caliber). Grinding is NOT how a competent gunsmith works nor the proper fix for that issue.
Now one issue you can come across is M4 feed ramps (which has NOTHING to do with being a pistol or not)
Here is a pic of feed ramps:
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