lawyer trigger
"Lawyer trigger" is a common term for the heavy, numb triggers found on many commercial firearms. The FCGs of these firearms have been designed to err heavily on the side of safety to avoid wrongful death or injury lawsuits, but as a result are heavy and numb. These triggers can be improved through careful polishing of selected parts, but this procedure should only be attempted by a professional.
lock time
Lock time is the delay between the trigger break and the actual firing of the firearm. In most firearms, lock time is comprised of the delay between the trigger actuating the hammer, the hammer striking the firing pin, and the firing pin then traveling forward to strike the primer. Accuracy is maximized by a shorter lock time, as every microsecond of the lock time is a chance for the rifle to shift position from the shooter's breathing or heartbeat, or more obvious environmental factors like gusts of wind or rain.
lower
A lower is the lower half of a two-piece receiver, usually housing the FCG and grip assembly. Most shooters are familiar with the concept of upper and lower receivers through the AR platform, but many other firearms have uppers and lowers, from the FAL battle rifle to the MAC submachine gun. The lower is often (but not always) the serialized portion of the gun, meaning it is the part that legally "makes the gun" and is taxed, tagged, and tracked by the authorities.
See also: AR lower
See also: AR lower
low brass
Low brass shotgun ammunition is ammunition that has been loaded to provide maximum economy, similar to plinking ammunition in handguns and rifles. All modern shotguns can safely fire low brass shells, but some semi-automatic shotguns will only function reliably when using high brass rounds, as the actions are tuned to withstand the increased pressure and cannot tolerate the reduced pressure of low brass economy rounds. Low brass rounds can be identified by the short brass bases on the shells, however, this short base is not structural and only serves to visually separate high brass from low brass rounds.
See also: magnum
See also: magnum
LE (law enforcement)
LE is an abbreviation for Law Enforcement. Equipment that is marketed towards LE is often of higher quality and commands a higher price than equipment marketed towards civilians. However, some vendors simply state that an item is for LE to attract customers, so choose carefully.
LER (long eye relief)
Eye relief is the maximum distance allowable between the shooter's eye and the eyepiece of a sight. Exceeding the eye relief of a particular sight will result in a partially obscured or completely invisible sight picture (vignetting).
In order to mount a sight on a pistol or scout rifle, a special LER sight must be used. LER sights are less common and generally more expensive compared to traditional scopes, due to limited demand and the unusually sturdy construction demanded by the powerful, high-recoil revolvers that LER sights are usually mounted on.
Most dot sights have unlimited eye relief, making them a type of LER sight.
In order to mount a sight on a pistol or scout rifle, a special LER sight must be used. LER sights are less common and generally more expensive compared to traditional scopes, due to limited demand and the unusually sturdy construction demanded by the powerful, high-recoil revolvers that LER sights are usually mounted on.
Most dot sights have unlimited eye relief, making them a type of LER sight.
long gun
A long gun refers to a firearm with a shoulder stock, versus a firearm such as a pistol, which does not have a shoulder stock. In most states in the US, the distinction is important in terms of the minimum legal age to purchase a firearm: 18 years old to buy a long gun, and 21 years old to buy a pistol.
LPK (lower parts kit)
A lower parts kit is a "component" of an AR-pattern rifle (it is actually many small components packaged together). An AR lower without an LPK is referred to as a "stripped" lower. The LPK usually contains (among other things) the FCG, so the rifle will not function without an LPK installed. Some consider the LPK to be an item where generic-brand equipment is more than acceptable, as the LPK is not often subjected to extraordinary stress, while other splurge on precisely crafted LPKs in pursuit of superior trigger feel and reliability.
LPKs do not require advanced expertise to install, but the procedure is delicate and time-consuming and is best performed with the aid of a few special tools, so most shooters do not attempt it.
LPKs do not require advanced expertise to install, but the procedure is delicate and time-consuming and is best performed with the aid of a few special tools, so most shooters do not attempt it.
lug(s), locking lug
Locking lugs are protrusions that lock into corresponding recesses cut into the barrel, receiver, or slide when the bolt is closed. The lugs keeps the bolt in place when the cartridge is fired and the pressure in the chamber rises, then unlock from their recesses to allow the bolt to open. Locking lugs vary in number from just one to as many as nine, depending on the design of the firearm. "Lapping the lugs" is an accurizing procedure where all the lugs are ground down very precisely to ensure that they lock into place evenly and apply equal pressure to the bolt, ensuring that cartridge is seated as concentrically as possible.
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