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Posted: 3/7/2006 8:56:15 AM EDT
I told someone this was bad but then had no real certainty on whether or not it was true. I have heard it and it makes sense but I don’t know.


How bad is this and what is the problem?


Is this one of those things where after enough times it causes a problem like a cumulative thing, or on any given time it might cause damage it might not or one instance causes certain damage or what?
Link Posted: 3/7/2006 9:00:24 AM EDT
[Last Edit: 3/7/2006 9:01:02 AM EDT by thanegrooms]
It hits the bolt catch and it's leveraged agaist the bolt catch pin (plenty of force to do damage, even after only a few times)

But what do I know... this is just my 101st post.
Link Posted: 3/7/2006 9:03:44 AM EDT

Originally Posted By IAMLEGEND:
I told someone this was bad but then had no real certainty on whether or not it was true. I have heard it and it makes sense but I don’t know.


How bad is this and what is the problem?


Is this one of those things where after enough times it causes a problem like a cumulative thing, or on any given time it might cause damage it might not or one instance causes certain damage or what?



The hammer slamming into the bolt hold open, will damage or break it or the hammer and could damage the aluminum receiver area around it.

Some people use a piece of leather, and I believe there is a commercially made block for that purpose.

Bad idea. WORSE on an AR-180 as it WILL break the bolt hold open and bend the magwell if continued. I've seen lots of those done that way. Last bolt hold open on an AR-180 (Old Model) I had to replace was over 100 bucks. Enough OT. HTH.



Lonny
Link Posted: 3/7/2006 9:06:10 AM EDT
[Last Edit: 3/7/2006 9:24:46 AM EDT by IAMLEGEND]
So if my buddy did this did he break something? Because he called me on it (since it seems fine).

(Can it happen without causing damage or is it a guarantee of problems?)
Link Posted: 3/7/2006 9:16:32 AM EDT
These instructions should really be updated to warn against doing this during the hammer function test and safety test...

http://www.ar15.com/content/guides/assembly/lower/
Link Posted: 3/7/2006 9:35:07 AM EDT
You just run the increased risk of breaking something if you do it. I've done it once. It was an accident. What a sickening sound. That was enough to make me pay attention to what I was doing.

Your friend may not have broken anything the first time, but if he keeps it up, someday something will break.
Link Posted: 3/7/2006 10:03:26 AM EDT

Originally Posted By IAMLEGEND:
(Can it happen without causing damage or is it a guarantee of problems?)



It can happen w/o causing problems. But I won't do it. Broken bolt catchs are possible, and I've seen the web of the lower receiver crack once. Yeah it's probably finding flaws that were already in the parts - but why tempt fate?
Link Posted: 3/7/2006 10:13:03 AM EDT
Buy some Snap Caps work great. I use them on all my guns. hug.gif [peep
Link Posted: 3/7/2006 10:16:30 AM EDT
Link Posted: 3/7/2006 10:17:36 AM EDT

Originally Posted By cobrahd1999:
Buy some Snap Caps work great. I use them on all my guns. [peep



Uhh how do Snap Caps help when there is no upper?
Link Posted: 3/7/2006 10:18:19 AM EDT

Originally Posted By Bumblebee_Bob:
You just run the increased risk of breaking something if you do it. I've done it once. It was an accident. What a sickening sound. That was enough to make me pay attention to what I was doing.

Your friend may not have broken anything the first time, but if he keeps it up, someday something will break.



+1. Just did it yesterday. Sheesh louise...
Link Posted: 3/7/2006 10:36:25 AM EDT
here's a tip that works well

If you use the acu wedge it will be sitting there in your lower. Take it out, turn it over (like a chair that is flipped over legs up on top of a table) and let the hammer strike the tapered part of the accu wedge. I learned this while installing/testing 2 stage triggers.
FWIW
Link Posted: 3/7/2006 10:39:11 AM EDT

Originally Posted By Forest:

Originally Posted By IAMLEGEND:
(Can it happen without causing damage or is it a guarantee of problems?)



It can happen w/o causing problems. But I won't do it. Broken bolt catchs are possible, and I've seen the web of the lower receiver crack once. Yeah it's probably finding flaws that were already in the parts - but why tempt fate?



No, I will definitely not tempt fate Forest...it's just that it was done to my AR and I am worried. I don't want any hidden damage that will cause a failure in the future.

Link Posted: 3/7/2006 10:45:25 AM EDT

Originally Posted By IAMLEGEND:

Originally Posted By Forest:

Originally Posted By IAMLEGEND:
(Can it happen without causing damage or is it a guarantee of problems?)



It can happen w/o causing problems. But I won't do it. Broken bolt catchs are possible, and I've seen the web of the lower receiver crack once. Yeah it's probably finding flaws that were already in the parts - but why tempt fate?



No, I will definitely not tempt fate Forest...it's just that it was done to my AR and I am worried. I don't want any hidden damage that will cause a failure in the future.




Just let it happen once and learn from it.
Link Posted: 3/7/2006 10:48:04 AM EDT

Originally Posted By unseenSNIPER:

Originally Posted By IAMLEGEND:

Originally Posted By Forest:

Originally Posted By IAMLEGEND:
(Can it happen without causing damage or is it a guarantee of problems?)



It can happen w/o causing problems. But I won't do it. Broken bolt catchs are possible, and I've seen the web of the lower receiver crack once. Yeah it's probably finding flaws that were already in the parts - but why tempt fate?



No, I will definitely not tempt fate Forest...it's just that it was done to my AR and I am worried. I don't want any hidden damage that will cause a failure in the future.




Just let it happen once and learn from it.



Well, thinking back to it makes me feel nauseous so I think I definitely learned from it.
Link Posted: 3/7/2006 12:57:07 PM EDT
It's true. I'm embarrassed to say that I speak from personal experience that letting the hammer snap forward on a lower without the upper attached can break the bolt release mechanism. Back in my early AR-15 days, I did this to a brand new Bushmaster and broke the bolt release after about 20 or so dry fires. I'm just glad that small part broke before it cracked my receiver (also possible).

Don't do it.
Link Posted: 3/7/2006 1:37:15 PM EDT

I actually broke a bolt catch doing that. (Colt) Don't do it.
Link Posted: 3/7/2006 1:39:26 PM EDT

Originally Posted By BeetleBailey:
I actually broke a bolt catch doing that. (Colt) Don't do it.



First time or did you do it a few times?

I'm totally convinced I was right for thinking it was bad (with what everyone is telling me) but I am also trying to figure out if damage was done.

Everything seems fine right now...

Link Posted: 3/7/2006 1:42:58 PM EDT
I use an old foam earplug usually as a cushion in front of the hammer if I have the receivers apart. Bad idea to drop the hammer for a "full power shot" into the hold open and the lower receiver.
Link Posted: 3/7/2006 1:47:51 PM EDT
There's nothing to absorb the energy from the hammer's impact except the back of the mag well and the bolt catch-which were NOT designed to absorb that energy. I've seen pictures of cracked mag wells or distorted bolt catch slots. That's more than enough to keep me from letting my hammer fall unrestrained when the lower doesn't have an upper on it.
Link Posted: 3/7/2006 1:49:11 PM EDT

Originally Posted By GHPorter:
There's nothing to absorb the energy from the hammer's impact except the back of the mag well and the bolt catch-which were NOT designed to absorb that energy. I've seen pictures of cracked mag wells or distorted bolt catch slots. That's more than enough to keep me from letting my hammer fall unrestrained when the lower doesn't have an upper on it.



Me too. I won't be doing it. THis was an accident as it was.

The thing is, I'm trying to figure out if there could be damage I can't detect.

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