AR-15 Rifle Test Quiz

I am semi-retired and I am taking a self-passed and self-taught Firearms Armorers course. I have covered over 25 different firearms in this course and now I am on the AR-15 Rifle course which is my last firearm in the Armorers course.

I hope to become a part-time light Gunsmith in the future. I am now working part-time with a Gunsmith that has over 40 years’ experience. I have my CHL and my FFL.

There are many questions covering this firearm and I have answered them to the best of my ability but during my study and research I am having some problems with these quiz questions. Either I am not sure of the correct answer or I have conflicting answers. I need to get 85% of the questions correct.

Can you help me determine the correct answers for these quiz questions? Please correct my wrong answers!

Thanks for your help.

37. How does the magazine catch come out of the receiver?
a) It unscrews
b) It is driven out with a punch
c) You must compress the magazine button and press the pivot bushing out of the receiver
d) It does not come out, as it is integral with the receiver

38. The bolt catch is held in the receiver by one roll pin - True or False?

39. The bottom of the trigger guard opens for what purpose?
a) To facilitate easy field stripping
b) To act as a monopod for accurate shooting
c) To accommodate a gloved shooter d) To release the trigger group for further disassembly

40. The bottom latch on the trigger guard can be opened with a 5.56mm cartridge - True or False?

41. The' carrier key is machined to be integral with the bolt carrier and cannot be taken apart - True or False?

42. The firing pin retaining pin is merely a cotter key (or pin) and can be easily replaced with any other cotter pin as long as it is the same length and diameter - True or False?

43. The bolt needs to come out of the bolt carrier before the cam pin does - True or False?

44. How many gas rings are on the bolt?
a) 1
b) 2
c) 3
d) 4

45. Short cycling can occur if the gas rings are too loose - True or False?

46. The ejector and the extractor are held in place in/on the bolt by the same roll pin - True or False?

47. The ejector is spring loaded - True or False?

48. When reassembling the bolt carrier assembly, the firing pin must go into the bolt before the cam pin does - True or False?

49. The best spec for firing pin protrusion is between
a) .018" and .035"
b) .040" and .050"
c) .050" and .065"

50. The trigger pin goes through the trigger and the
a) disconnector
b) hammer
c) spacer weight
d) rear of the magazine catch

51. The groove in the takedown pin should face what direction when it goes back into the receiver?
a) Towards the top
b) Towards the bottom
c) Towards the front
d) Towards the rear

52. When putting the gas tube back in the upper receiver, which end does the gas tube need to go into first?
a) The receiver end
b) The front sight end

53. The side of the gas tube that is plugged must reside in the receiver - True or False?

The only one I would question is no 40. I believe the trigger guard was designed to be opened with a 5.56 cartridge, in fact I just tried it and it worked without a problem.

After reading this thread earlier this morning, that's one of the first things I checked when I went to the range this afternoon. Works good.

Looks good. The only one I'm not 100% on is the firing pin protrusion. I think your right, but I don't have my armorers book available. I took the Bushmaster course three years ago.

Much of that info on the quiz was taught to some of us in the military many years ago.Now the bit about firing pin protrusion-not so much as that was armorers stuff.

__________________
...magnomark...

...Just take the shot...
Don't bother me-I'm reloading!

HeHe, yea, that is where I got the part about the trigger guard being designed to be released with a 5.56 round. Add to that the fact that I spent a good part of my Army service in Alaska so as you can imagine, we wore gloves quite a bit, and mittens. Had the mittens tied together on a long tether that draped around your neck so that you could just toss either or both of them off and they would still be hanging around your neck. The gloves were worn inside the mittens.