FTE 217 Final Exam | Verified with 100% Correct Answers

FTE 217 Final Exam | Verified with 100% Correct Answers The reason there are few "forge shops" that handle the AR market is because: 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. 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. False "MIL-SPEC", which is short for "military specification", is the lowest allowable standard for something to be accepted into the military. 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. .221 The bolt catch: holds the bolt in the open position. Excessive _______ within the casing/chamber can dislodge primers. 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. 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. False The flange on the firing pin of a semi-automatic only firing pin measures at: .330 The cons of a piston-driven AR system might include the following (select all that apply): Increased weight True or False: The piston system in the standard AR platform is becoming less popular due to its increased complexity in components. False When installing the pistol ______ screw, it can be easy to cross-thread it if it's not properly guided into the threads. Grip A piston-driven AR does not get hot. False Generally, the selector is installed in the lower receiver prior to the trigger. 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 80 True or False: The timing of components within a firearm is critically affected by the tolerance or space between the components. True According to the reading material this week (i.e. gas port location and not ATF regulation), rifle length barrels are ______ inches long. 20 What are the eight steps in the cycle of operations? 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? Recoil energy What is the term used in gunsmithing to describe a measurement that is within the ten-thousandths place value? Zero tolerance Which of the following statements is true about the impact of tight tolerances on firearms? Tight tolerances can make a firearm more accurate. Click on the hammer spring. What is the range for a dimension of .3255" +/- .0005" in gunsmithing? .325 in. to .326 in. Click on the pivot pin. What is the decimal equivalent of the fraction 1/16? .0625 in. Click on the disconnector. According to this week's lecture material, what is the thickness of a strand of fur on a German shorthaired pointer in thousandths of an inch? .001 in. Click on the magazine release button. What is the slang term often used by gunsmiths when referring to the measurement of "thousandths of an inch?" Thou To keep an AR running properly, a heavier gun grease will be needed. False Although Colt was the first main manufacturer of the AR-15/M-16 platform, at least in large quantities, the company was not all that interested in selling them to the civilian market. For this reason, some companies that contracted to Colt in the production of some parts filled that demand. True If you need to scrape carbon buildup off of your AR components, you are not cleaning your firearm enough. False Muzzle brakes and compensators are the same thing. True The extent to which you clean a firearm depends on what that firearm was used for and for how long it was used. True Flash hiders do their job by creating ________________ and disrupting the bubble of hot gases. Turbulence The gas rings on an AR bolt should be oiled. True In general, the M4 differs from the M16 in that the M4 has: A shorter barrel.