On an AR-15 does the bolt lock open after the last round is fired?

Question

I was shooting one and it didnt lock open? how does a bolt lock open? which guns' bolts do lock open after the last round is fired?

Answer 1

Your AR should lock the bolt back after firing the last round. This is because the magazine follower engages the bolt lock when it's empty. It is a design element some firearms have. If yours doesn't it may be because the magazine is wore out or that you may be hitting the release while you were shooting. It's not really a huge issue either way.

Answer 2

The magazine remark (which you tried) and Fatefinger's remark (which you look to have tried) have been the main hardship-unfastened. Now you're all the way down to the less probable. Of the less probable the main hardship-unfastened (if that's clever) is that the cringe spring on the bolt is in basic terms too sturdy, or that the bolt isn't lubed properly sufficient to run easily and that the fired around isn't working the bolt all the some time past. there's a rigidity difference between the 5.fifty six ammo and the .223 ammo, I by no ability bear in mind that's which (i think of the 5.fifty six is warmer) yet you should objective working various the warmer ammo by way of it to work out if that cycles it a procedures sufficient back. If the gun is type new then this might no longer be unexpected as part of the breaking in. If the gun is in any different case cycling oftentimes that's quite no longer likely that the gas gadget is largely incorrect, yet you will possibly be able to might desire to do a careful cleansing interest in case there became packing grease or something in there. If it nonetheless does this after a sturdy cleansing and various of alternative hundred rounds, i might vote for changing out the buffer spring. Thinkingblade

Answer 3

On the AR and M-16 series of rifles (and most all other semi-auto) the firearm has a bolt lock/release that is pushed into place by the top plate (magazine follower) when the last round is fired on an empty magazine.



Sounds like the magazine spring on the AR you were shooting is weak. They get weak over time - or - dirt and grime in the magazine can cause this too.



If you were shooting reloads - if the choosen powder charge is a bit on the light side, this can happen to. The gas system has just enough power to eject and cycle a new round - but - not enough power to go the extra half inch against the recoil spring to properly lock up.



An absolute totally filthy recoil spring can cause this too. The front part of the spring housing is kinda clean for constant use, but, enough grime has built up to prevent the bolt from pushing that last half inch of spring to lock up.



Hope this helps

Answer 4

The magazine remark (which you tried) and Fatefinger's remark (which you look to have tried) have been the main trouble-free. Now you're right down to the less in all probability. Of the less in all probability the main trouble-free (if it incredibly is clever) is that the cringe spring on the bolt is merely too good, or that the bolt isn't lubed nicely sufficient to run easily and that the fired around isn't working the bolt all the earlier. there's a stress distinction between the 5.fifty six ammo and the .223 ammo, I in no way undergo in innovations it incredibly is which (i think of the 5.fifty six is warmer) yet you could attempt working a number of the warmer ammo with the aid of it to ensure if that cycles it a procedures sufficient back. If the gun is kind new then this won't be unpredicted as component to the breaking in. If the gun is otherwise cycling regularly that's quite no longer likely that the gas equipment is basically incorrect, yet you could might desire to do a careful cleansing interest in case there grow to be packing grease or something in there. If it nevertheless does this after a stable cleansing and various hundred rounds, i might vote for changing out the buffer spring. Thinkingblade

Answer 5

I just noticed your avatar and the first answers' avatar are exactly the same