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AR15.COM
4/11/2004 6:44:25 PM EDT
I know that it is leagl in NJ to block a hi cap magazine so that it holds only 15 rounds. But the thing I was wondering is, are all blocks OK? I was planning to put 15 spent shells under the floorplate of a 30 round mag, but is it also OK to load 15 spent rounds into the mag , and block it that way? I guess the last live round will chamber  one of the spent rounds, so can I put 16 spent rounds in the mag instead, and just manually extract the spent shell, and replace it in the mag? That way it cannot hold more than 15. Any thoughts on this? I was thinking about this because when I go to PA, it would be easier to unload the spent shells than to have to disassemble the mag in order to take advantage of the more liberal mag laws there.
4/12/2004 2:42:04 AM EDT
[#1]
What I do is remove the floor plate and load the empties that way. It is a pain but works very well.

Mike
4/12/2004 7:38:44 AM EDT
[#2]
I wouldn't want to risk it. Your not really blocking the mag. by putting 15 pieces of fired brass in the mag before loading the live rounds. Is that really blocking the mag? I would have to say no IMHO. Take off the floorplate and put a piece of wood dowel in there to be safe.
4/12/2004 9:45:07 AM EDT
[#3]
We're basically working off a NJ court opinion that says "temporarily blocked" is OK.  Last year or so, the state police tried to change that by issuing a "rule" on their own.  It was not approved so we get to fall back on the opinion.

Anyone that's going to bother you about it (cops) IMHO, aren't going to know or much care if the mag is blocked or not.

Best of luck,

I should add, mine are blocked under the floorplate.
4/12/2004 2:45:17 PM EDT
[#4]
I have to agree that loading spent shells into the top side of the mag isn't a very safe option.  

Also, I'll bet that I can unload two mags by sliding the floorplate out a little and dropping the dowel out than you can strip 15 shells from a single mag!

Get some three-eigths or half-inch dowels from Home depot and cut to appropriate lengths.  You can block more than a dozen mags for ~$3.
4/21/2004 9:00:03 PM EDT
[#5]

I took two wood dowels that fit inside the spring side-by-side.  I rounded off the ends
and then glued & nailed them side-by-side with 2 small brads.  They work perfectly!  Never had a problem.  Just make sure the ends are nice & round so they don't snag on
the spring. It just free-floats inside the mag.
4/21/2004 9:01:03 PM EDT
[#6]

I took two wood dowels that fit inside the spring side-by-side.  I rounded off the ends
and then glued & nailed them side-by-side with 2 small brads.  They work perfectly!  

Never had a problem.  Just make sure the ends are nice & round so they don't snag on
the spring. It just free-floats inside the mag.
4/23/2004 6:57:39 AM EDT
[#7]
I go one step further than the dowel rod method.

I remove the floorplate and spring, but keep the follower in the mag.  Load up 15 rounds in the mag while keeping pressure on the follower.  I insert a tape measure through the bottom of the mag until it hit the follower and keep that measurement to the base of the mag.  Remove the rounds and the follower.  On the outside of the mag, I measure up the same distance and place a mark (center punch).  I drill a hole and then put a rivet in there.  Reassemble the mag and walla.  The follower will hit the rivet at the 15 round mark and no rattling dowel rods.

Seems like a lot, but better to be safe.
4/28/2004 3:22:48 PM EDT
[#8]
Related question: If I have a .458 SOCOM, which uses the AR15 mag, is it a legal to have a 30 round magazine, MARKED .458, UNblocked for the 15 SOCOM rounds?