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GLOCK G21 GEN4 Standard | .45 Auto




Glock G21 Gen 4 For Sale:Remarkable for its accuracy and light recoil, the GLOCK 21 Gen4 delivers the power of the 45 Auto round with high magazine capacity. The Modular Back Strap system makes it possible to instantly customize its grip to accommodate any hand size. The reversible magazine catch makes it ideal for left and right-handed shooters The Gen4 system is the perfect complement to the 45 Auto caliber cartridge.Glock G21 Gen review

Glock 21 Gen 4 Specs


  • .45 Auto / Safe Action


  • Length – 204 mm / 8.03 in.
  • Height – 139 mm / 5.47 in.
  • Width – 32.50 mm / 1.27 in.
  • Barrel Height – 32 mm / 1.26 in.
  • Length Between Sights – 172 mm / 6.77 in.
  • Barrel Length – 117 mm / 4.60 in.


  • Unloaded – 830 g / 29.30 oz.
  • Loaded – 1085 g / 38.30 oz.

Trigger Pull / Travel:

  • Trigger Pull – ~2.5 kg / ~5.5 lbs.
  • Trigger Travel – ~12.5 mm / ~0.49 in.

Barrel Rifling / Length of Twist:

  • Barrel Rifling – Right Hand, Octagonal.
  • Length of Twist – 400 mm / 15.75 in.

Magazine Capacity:

  • Standard – 13
  • Optional – 10

The basic four safety rules

1. Treat every firearm as if it’s loaded. This means anything you would do with the gun while unloaded, is the same thing you would do with it ready to fire. I can personally tell you of two negligent discharges I witnessed with people when people who knew better pulled the trigger on a gun they just ‘knew’ were unloaded.

2. Never point a firearm at anything that you do not intend to destroy. This includes any and all horseplay with firearms– especially if you forget rule number one above. This translates into the concept of proper muzzle-control. Remember, the only things that are cleared to point a firearm at are a target, berm, or threat. Moreover, even with that, keep in mind all of the other rules.

3. Always be sure of your target and what is beyond it or behind it. Bullets are funny things. Even low-powered rimfire ammo can travel significant distances and penetrate walls, doors, etc. Keep this in mind even in self-defense instances.

4. Keep your finger off the trigger until you are on target. Ah trigger discipline, or commonly just called TD. It’s pretty hard for a firearm to just suddenly go off unless the trigger is pulled back successfully. If your trigger finger is aligned down the side of the trigger well, or better, down the side of the slide, until you are ready to fire, the less likely you are to shoot yourself in the leg or accidentally wing an innocent bystander. “Booger hook off the bang switch!”



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