I have to admit, I'm all into this whole bumpfiring bit.  After honing my skills on my Ruger Mk. II, I felt I just HAD to bump my AR (I have a "Varminter" with a chrome lined barrel.)

So on my last camping trip with the buddies, I waited until dark and then let er rip for 10 or 15 rounds.  Have to say, and uplifting experience for sure.  But afterwards, I felt a little bad.  Like I can't do that very much with my "target" rifle.  And so I was just wondering, how hard IS bumpfiring on a chrome lined AR.  I know it's more of a throat erosion issue (as with MOST barrel wear) but is it really THAT detrimental to accuracy.  

No, bumpfiring is not what I had in my when I bought my Varminter, but it's fun all the same.  I'd like some input on the subject.

Gundraw

Quoted: I have to admit, I'm all into this whole bumpfiring bit.  After honing my skills on my Ruger Mk. II, I felt I just HAD to bump my AR (I have a "Varminter" with a chrome lined barrel.) So on my last camping trip with the buddies, I waited until dark and then let er rip for 10 or 15 rounds.  Have to say, and uplifting experience for sure.  But afterwards, I felt a little bad.  Like I can't do that very much with my "target" rifle.  And so I was just wondering, how hard IS bumpfiring on a chrome lined AR.  I know it's more of a throat erosion issue (as with MOST barrel wear) but is it really THAT detrimental to accuracy.   No, bumpfiring is not what I had in my when I bought my Varminter, but it's fun all the same.  I'd like some input on the subject. Gundraw

Hell, I'd like to try it if I had somewhere to do it without attracting the attention of the local po-lice.
It can't be any worse than firing full auto, and that's what AR15/M16 was originally designed to do.
Yeah, it will increase wear and tear, but what the hell, if it makes you smile, then it's well worth the eventual replacement parts.

Did you feel bad bumping that Ruger MKII?

Yes, it makes me smile  , So that was kind of my outlook.  I figured the BEST thing I could do if I was gonna bump is to make sure the barrel is pretty cool before I lay into it.  Keep the heat down.  More than anything though, I bought the rifle as a varmint/target rifle, something to really hone in on accuracy with.  BUT, I need to have my fun too.  

I actually have private ground to camp on, so I could bump all night.  All I know is that I surprised them, didn't tell them I was gonna actually bump, and the look on their faces was hysterical.  Not to mention it was  real testosterone booster when you have the "machine gun" feel in front of you.  

Buey -
Ruger Mk II 5.5" SS $300
Bushy Varminter w/acc and scope $1700

hehehehe

I have gotten QUITE a kick out of bumping the Mark II though.  It's VERY challenging and really made me hone my skills.  Shoot, when I pulled that AR out to bump (.223, a cartridge that actually has a little recoil) I wasn't even trying.  

Maybee I am misunderstanding you, you say you have a bushmaster varminter?, that is chrome lined?   I was under the impresion that the varminter was not chromed but chromemoly and the varmint special was stainless. Did you special order? either way bumping is not going to noticibly degrade your accuracy any time soon

I don't reckin' it'll hurt your barrel.  It's more of a pathetic poser act in my opinion though, and questionable in the safety department too.

but, whatever.

It's the worst thing.  I keep wearing out my stripper clips trying to keep the mags loaded.

ha ha ha ha Chomr lined Varmiter/targetrifle......what and oxymoron

halik

If you want to take it seriously (which is Great fun at times) :

Drop $400 on a new upper ASSEMBLY (w/bolt), then if you know you are going to just be plinking/bumping at under 100yds, have that upper on.  When you go for Range/etc, swap out (1 minute swap if your slow).   Reason to keep bolt/carrier with bumping barrel is that it will wear faster than your non-bumping barrel's lugs.

Probably find a complete A2 upper cheaper in EE.

(yes, I have bumpfired Wolf through a CAR-3 HBAR Elite , it was a dare...)

-- Edited to add:  Official BumpFire Acadamy Instructor.

Buy an SAR 1 and bump it insanely!

whats bump firing?

You pull forward on the rifle with the handgrips (MUCH easier with a Vert grip) while holding your trigger finger stationary and rigid, thus causing the trigger to (bounce) move rapidly as the weapon cycles, simulates full auto fire. I have seen a video where an M16 shooter was side by side with a AR15 shooter bump firing, both from the shoulder, AR15 with a vertical foregrip, and the AR15 finished the 30 round clip first.(barely, hard to tell who started first). I would not have believed had I not seen it. Bump firing from the hip is easy, wildly inaccurate and probably not safe. Bump firing from the shoulder takes a lot of practice, but I have seen rounds impact within a 10 inch area at 25 yards. DO NOT TRY THIS unless you realize the risks!

It is not illegal since there is still only one shot per trigger pull. This is what the hellfire and similar devices attempt to do, but they tend to have less than spectacular results. don't try this at the local range unless you never plan on going back and don't mind meeting the local Police Department when the rangemaster calls them.

Forget the rifle... it brings unwanted attention at the range.  This is best done way out in the boonies with noone in earshot.

You just don't need to be doing this at a public range.  The antis yak enough about how "assault weapon" owners convert the guns to fire full auto and "spray fire from the hip with bullet hoses".  Don't add fuel to the fire.

i heard that firing pins on semiauto rifles cant stand up to the high amount of feed goin on in the bumpfiring process. just something i heard. anyways, im sure a shattered firing pin would be great

Quoted: Forget the rifle... it brings unwanted attention at the range.  This is best done way out in the boonies with noone in earshot. You just don't need to be doing this at a public range.  The antis yak enough about how "assault weapon" owners convert the guns to fire full auto and "spray fire from the hip with bullet hoses".  Don't add fuel to the fire.

Correct.  DO NOT DO THIS AT YOUR PUBLIC RANGE!    I only advocate "bumpin" when it is somewhat appropriate and safe (very large backstop a short distance away)

Usually at the ARF Shoots (BulletFest, GunStock, Hun Farm, local get togethers, etc) where full auto is already around is the place, unless you have a large area of private property.

If you are in an area where population is anywhere near "dense" (somebody can hear shots), expect the police to be called for somebody firing full auto.

It isn't the greatest thing, kinda fun once or twice...  Board member tattoo had his barrel glowing from bumping it.

A 9mm AR "outruns" an UZI, and many AR-15's outrun M16 ROF with right trigger.

Don't annoy a public range with it (you would probably lose your membership).  Unless you practice alot, it is very difficult to control aim.  

For those who do not know what it is or just want to see it:

BumpFire Academy

Quoted: i heard that firing pins on semiauto rifles cant stand up to the high amount of feed goin on in the bumpfiring process. just something i heard. anyways, im sure a shattered firing pin would be great

That's BS.  The fireing pin on an AR is the same as the fireing pin on an M16

stupid question whats bump firing?

I guess things are different here in Texas.  No one cares about bumpfiring at an informed range.  My normal range loves it.  Plus we have lots of autos around here.  It's not hard to get one, just expensive.  

I did go to one range where the owner literally crapped his pants when me and my buddy both bumpfired at the same time.  He claimed our bullets were going over a 20 foot berm......whatever.  I saw exactly where they were going, he is just a wimp.  It is perfectly legal and if I am doing it safely with my own ammo that I bought, what's the problem.  There is nothing the police can do.

Quoted: stupid question whats bump firing?

_DR answered previously in the thread.  Basically you keep your trigger finger rigid and use the recoil of the rifle to fire weapon by trying to keep the rifle forward with your non shooting hand.

Quoted: Quoted: i heard that firing pins on semiauto rifles cant stand up to the high amount of feed goin on in the bumpfiring process. just something i heard. anyways, im sure a shattered firing pin would be great That's BS.  The fireing pin on an AR is the same as the fireing pin on an M16

Not true, they are two different pins. When I find that comparison pic, I will post it.

Same material AFAIK, different design.

Quoted: I guess things are different here in Texas.  No one cares about bumpfiring at an informed range.  My normal range loves it.  Plus we have lots of autos around here.  It's not hard to get one, just expensive.   I did go to one range where the owner literally crapped his pants when me and my buddy both bumpfired at the same time.  He claimed our bullets were going over a 20 foot berm......whatever.  I saw exactly where they were going, he is just a wimp.  It is perfectly legal and if I am doing it safely with my own ammo that I bought, what's the problem.  There is nothing the police can do.

Where is this range? I want to go there, I live in DFW and most rangemasters wont allow anything more than a double tap.

Quoted: Quoted: Quoted: i heard that firing pins on semiauto rifles cant stand up to the high amount of feed goin on in the bumpfiring process. just something i heard. anyways, im sure a shattered firing pin would be great That's BS.  The fireing pin on an AR is the same as the fireing pin on an M16 Not true, they are two different pins. When I find that comparison pic, I will post it. Same material AFAIK, different design.

I have scraped carbon off of M16A1 firing pins and M16A2 firing pins (they were the same) for years when I was a grunt. Now I scrape carbon off my AR15 clone firing pins. They are all the same, you can swap firing pins from an M16xx to an AR15 clone anytime, no problem.

I cant find that pic anywhere, and I have looked.

The best reference I can give you is www.bushmaster.com to confirm there are two such different animals.

Under chrome firing pins, it lists both options,a nd says clearly, specify ar15 or m16.

Someone will chime in with more info and hopefully that side by side pic.

IIRC its in the collar. wider or something. While I dont know the exact difference, I know their is a difference.

Quoted: I cant find that pic anywhere, and I have looked. The best reference I can give you is www.bushmaster.com to confirm there are two such different animals. Under chrome firing pins, it lists both options,a nd says clearly, specify ar15 or m16. Someone will chime in with more info and hopefully that side by side pic. IIRC its in the collar. wider or something. While I dont know the exact difference, I know their is a difference.

I don't disagree that there may be different designs of firing pins, but by design the difference between and M16 and an AR15 is primarily the fire control group (sear, hammer,trigger) the selector and the bolt carrier. The bolts and firing pins are completely interchangable. An M16 carrier will work in AR15, but most M16s won't fire full auto with a strictly semi bolt carrier such as armalite and colt have made for their ar15 models. I have used military surplus M16 firing pins quite frequently in my AR15 clones.

Perhaps Tweak, Hawkeye or NewARguy can clarify.

how in the hell do you bumpfire a MkII?

Quoted: i heard that firing pins on semiauto rifles cant stand up to the high amount of feed goin on in the bumpfiring process. just something i heard. anyways, im sure a shattered firing pin would be great

Wives tale...

There's no diff between an AR15 firing pin and a M16 firing pin...

All of the major AR makers also make full-auto weapons for law enforcement & export.

The parts are the same in both semi and full, except the bolt carrier & fire control group...

Quoted: Maybee I am misunderstanding you, you say you have a bushmaster varminter?, that is chrome lined? I was under the impresion that the varminter was not chromed but chromemoly and the varmint special was stainless. Did you special order? either way bumping is not going to noticibly degrade your accuracy any time soon

Yes, I special ordered.  I did my homework, and after consulting with some of the people and Bushmaster, and some of the people on here, I found that Chrome lining would best suit my needs, the DCM barrel was way too "soft", I needed something a little more durable and forgiving.
You are correct, the standard Varminter is NOT chrome lined.

Quoted: ha ha ha ha Chomr lined Varmiter/targetrifle......what and oxymoron halik

Sorry, I think Chomr lining is a Hesse exclusive.  And I believe Varmiters have been discontinued due to the shortage of Varmits.  

I think you would be surprised, the rifle is pulling in nicely.  As cmjohnson said, chrome lining has gotten a bad name in accuracy, but for no reason.  I'm here to find out for myself.  

Quoted: how in the hell do you bumpfire a MkII?

I was wondering when someone would ask this,

I posted this recent finding in the "handguns" forum a short while ago (few months).   One day I was pondering if I would ever bumpfire my Varminter.  It sounded so intriguing, and I had seen video's of it being done with various weapons.   Well that night, I was playing with my Mk II when all the sudden it hit me.  Since a MkII  has an internal bolt, it had the "grip" to let me bump fire.  I realized that with MOST automatic pistols, there is a full length slide, leaving no easy place to hold for such a procedure.  I didn't know for sure if it would work, but I knew I HAD to try.  It took me a few tries to get it to bump at all.  And now, I can get a full mag to go through lickity split.  

Few things I've noticed.  I have a "target" model, and the nice long 6 7/8" barrel gives a great grip, and the light trigger makes this bumping possible.  I tried the same thing with my father's Mk I, and was unable to bumb.  However, I have been able to get two of my buddies Mk II to bump and both had 5.5" bull barrels.  

It's a blast....AND CHEAP.  However, I find it much more challenging to get it to work, that for an AR, which has significantly more recoil to work with.


Gundraw

Does anyone have any vids other than the "Bumpfire Academy" one; I don't have the Divx stuff on my comp. Thanks

There IS a difference between the AR-15 & M16 firing pins.  I printed a photo posted by Tweek back in January but unfortunately didn't keep it electronically.  You can see the difference, though it's not much.  He says:
"The M16 has the larger coller.  The hammer will catch even the small collar of the AR pin if the hammer follows.  The larger collar of the M16 pin will catch ANY time the hammer is resting on the sear face of the trigger."
Measure your's if you don't believe it.  I did & the diameter if my M16 collar &  a back-up carrier/bolt assembly are both 0.375".  One from of my ARs is 0.34" with a second one a little smaller.
Let's see if my photos work - the M16 pin is on the right:
http://www.hunt101.com/img/209563.jpg
http://www.hunt101.com/img/209562.jpg

Quoted: I have seen a video where an M16 shooter was side by side with a AR15 shooter bump firing, both from the shoulder, AR15 with a vertical foregrip, and the AR15 finished the 30 round clip first.(barely, hard to tell who started first). I would not have believed had I not seen it.

That was me.........Here are the Vids

AR vs M16 Race

9mm AR

Funny bumpfire story this weekend.  
I was visiting family out of state and got up early on Sat to catch some range time.  I had the entire range to myself and after a while, I dumped a couple of mags by bumping.  A little while later, I was setting down my rifle and pulled off my muffs and heard a truck behind me.  As the engine shut off, I heard the dreaded siren chirp.  I turned around and was greeted by the County Sherriff (Not a deputy but the actual Sherriff).  He introduced himself and immediately looked down at the AR and made the "So, Fullauto huh?" comment.  I told him no it wasn't and cracked it open and let him see.  He gave me a puzzled look and I went on to explain.  Making a long story short, he actually called one of his deputies to come up and join us so I could teach them.  Turns out, the entire department has only one full auto in it's inventory but several semi AR's.  He wants me to teach his guys to bumpfire to "Scare the hell" out of anyone shooting at them.  Anyway, he wants me to come back soon.

Quoted: i heard that firing pins on semiauto rifles cant stand up to the high amount of feed goin on in the bumpfiring process. just something i heard. anyways, im sure a shattered firing pin would be great

wrong, i bumped 2500 rds recently, all in one day, no shattered pins, burned out barrels, or broken parts

I just bought my first AR and dont plan on bumping it but I'm sure I willh
http://www.andever-pa.com/images/cbump1.jpg

Excellent pic!

Bumpfiring isn't all that BAD, it's just a waste of ammo and wear on the barrel. If you have an old, worn beater barrel, some spare time and some deserted property, by all means take two ARs...one for bumping and the other for plinking. That's how I would do it. Once the barrel is too worn to shoot very accurately, make it a dedicated bumper.

Be safe and have fun, tactical posers!

It's not as bad as childhood porn which I guess is supposed to make you addicted and grow up to abuse women.

Okay, I take back some of that sarcasm.  Bump firing IS addictive!

Bump firing is no worse on an AR-15 than an M16 operating in normal full auto, but it isn't as accurate.

I am finding I really like to bumpfire, even though I have an M16 and other MG's because I can fire a lot of my non-MG's in simulated full auto adding a new dimension of fun factor to those particular firearms.

ETA:  While the M16 and AR-15 firing pin is most definitely different as the picture notes, in modern enhanced carriers using a full firing pin hood it won't make any practical difference since the collar won't be catching on the hammer hook (if your hammer has one), and an AR-15 pin works fine in an M16, just not always the other way around.

I wish I had known about this type of firing with ARs before now. I've done it with my 1911, but for some reason never occurred to me to try with AK/ARs. Definitely next time I plink

how so you bump fire your 1911?  I can't figure out how you'd hold your hands etc....