FTE 217 WEEK 6 QUIZ |
QUESTIONS AND ANSWERS | 2026
UPDATE | 100% CORRECT -
SONORAN DESERT SCHOOL.
The reason there are few "forge shops" that handle the AR market is because: -
answer- other "forge shops" found that the AR work was a marginal part of their
business and their time and resources were better spent elsewhere.
The 5.56 NATO chamber has a longer ______ than a .223 Remington chamber to allow
for the increased pressures in the 5.56 NATO cartridge. - answer- throat
The problem with the AR (AR-15, AR-10, and AR9) platform is that all of the
components, no matter how small they are, are purpose-built and you cannot source
them from anywhere else, other than from an authorized dealer. - answer- false
"MIL-SPEC", which is short for "military specification", is the lowest allowable standard
for something to be accepted into the military. - answer- true
The projectile of the .22LR cartridge fits a barrel with a nominal _________________-
inch diameter bore, while the .223/5.56 is designed for a bore with the nominal diameter
of .224. - answer- .221
The bolt catch: - answer- holds the bolt in the open position.
Excessive _______ within the casing/chamber can dislodge primers. - answer- pressure
In the AR9, or in ARs that have been converted to chamber the 9mm and .22LR
cartridges, the gas system required for the AR-15 is no longer needed, however, other
adjustments to certain components will need to be made. - answer- true
The problem with the AR platform, as it relates to gunsmithing, is that few
manufacturers still make the small components used in its construction. This would
include items like the forward assist, dust cover, and trigger. This creates a powerful
bottleneck, especially when supply issues occur, as seen during the COVID-19
pandemic. - answer- false
The flange on the firing pin of a semi-automatic only firing pin measures at: -
answer- .330
, The cons of a piston-driven AR system might include the following (select all that apply):
- answer- Increased weight
True or False: The piston system in the standard AR platform is becoming less popular
due to its increased complexity in components. - answer- false
When installing the pistol ______ screw, it can be easy to cross-thread it if it's not
properly guided into the threads. - answer- grip
A piston-driven AR does not get hot. - answer- false
Generally, the selector is installed in the lower receiver prior to the trigger. - answer-
false
If you have to put body weight into torquing the barrel nut on an AR-style firearm, you
have likely exceeded the _______ ft. lbs. limit - answer- 80
True or False: The timing of components within a firearm is critically affected by the
tolerance or space between the components. - answer- true
According to the reading material this week (i.e. gas port location and not ATF
regulation), rifle length barrels are ______ inches long. - answer- 20
What are the eight steps in the cycle of operations? - answer- Feeding, chambering,
locking, firing, unlocking, extracting, ejecting, cocking
What type of energy is utilized in a straight blowback design to move the bolt to the
rear? - answer- Recoil energy
What is the term used in gunsmithing to describe a measurement that is within the ten-
thousandths place value? - answer- Zero tolerance
Which of the following statements is true about the impact of tight tolerances on
firearms? - answer- Tight tolerances can make a firearm more accurate.
Click on the hammer spring. - answer-
What is the range for a dimension of .3255" +/- .0005" in gunsmithing? - answer- .325
in. to .326 in.
Click on the pivot pin. - answer-
What is the decimal equivalent of the fraction 1/16? - answer- .0625 in.
Click on the disconnector. - answer-
QUESTIONS AND ANSWERS | 2026
UPDATE | 100% CORRECT -
SONORAN DESERT SCHOOL.
The reason there are few "forge shops" that handle the AR market is because: -
answer- other "forge shops" found that the AR work was a marginal part of their
business and their time and resources were better spent elsewhere.
The 5.56 NATO chamber has a longer ______ than a .223 Remington chamber to allow
for the increased pressures in the 5.56 NATO cartridge. - answer- throat
The problem with the AR (AR-15, AR-10, and AR9) platform is that all of the
components, no matter how small they are, are purpose-built and you cannot source
them from anywhere else, other than from an authorized dealer. - answer- false
"MIL-SPEC", which is short for "military specification", is the lowest allowable standard
for something to be accepted into the military. - answer- true
The projectile of the .22LR cartridge fits a barrel with a nominal _________________-
inch diameter bore, while the .223/5.56 is designed for a bore with the nominal diameter
of .224. - answer- .221
The bolt catch: - answer- holds the bolt in the open position.
Excessive _______ within the casing/chamber can dislodge primers. - answer- pressure
In the AR9, or in ARs that have been converted to chamber the 9mm and .22LR
cartridges, the gas system required for the AR-15 is no longer needed, however, other
adjustments to certain components will need to be made. - answer- true
The problem with the AR platform, as it relates to gunsmithing, is that few
manufacturers still make the small components used in its construction. This would
include items like the forward assist, dust cover, and trigger. This creates a powerful
bottleneck, especially when supply issues occur, as seen during the COVID-19
pandemic. - answer- false
The flange on the firing pin of a semi-automatic only firing pin measures at: -
answer- .330
, The cons of a piston-driven AR system might include the following (select all that apply):
- answer- Increased weight
True or False: The piston system in the standard AR platform is becoming less popular
due to its increased complexity in components. - answer- false
When installing the pistol ______ screw, it can be easy to cross-thread it if it's not
properly guided into the threads. - answer- grip
A piston-driven AR does not get hot. - answer- false
Generally, the selector is installed in the lower receiver prior to the trigger. - answer-
false
If you have to put body weight into torquing the barrel nut on an AR-style firearm, you
have likely exceeded the _______ ft. lbs. limit - answer- 80
True or False: The timing of components within a firearm is critically affected by the
tolerance or space between the components. - answer- true
According to the reading material this week (i.e. gas port location and not ATF
regulation), rifle length barrels are ______ inches long. - answer- 20
What are the eight steps in the cycle of operations? - answer- Feeding, chambering,
locking, firing, unlocking, extracting, ejecting, cocking
What type of energy is utilized in a straight blowback design to move the bolt to the
rear? - answer- Recoil energy
What is the term used in gunsmithing to describe a measurement that is within the ten-
thousandths place value? - answer- Zero tolerance
Which of the following statements is true about the impact of tight tolerances on
firearms? - answer- Tight tolerances can make a firearm more accurate.
Click on the hammer spring. - answer-
What is the range for a dimension of .3255" +/- .0005" in gunsmithing? - answer- .325
in. to .326 in.
Click on the pivot pin. - answer-
What is the decimal equivalent of the fraction 1/16? - answer- .0625 in.
Click on the disconnector. - answer-
