Glock 21 Gen4 .45 ACP Semi-Automatic Pistol – Full-Size, Fiber-Optic Front Sight, 13-Round Capacity
This Glock 21 Gen4 combines the proven .45 ACP platform with user-focused upgrades that enhance handling and visibility. A yellow fiber-optic front sight speeds target acquisition, while an installed grip-tape wrap adds texture without altering the frame. Backed by Glock’s dual captive recoil-spring system and octagonal-rifled barrel, this full-size pistol offers reliable performance and a generous 13-round standard magazine capacity.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling – Sharp lands and grooves.
Specific Condition Notes: The pistol exhibits light handling wear and a few superficial surface scratches that do not affect function.
What’s Included
- Glock factory plastic pistol case (black)
- Three 13-round Glock steel-lined polymer magazines
- Aftermarket adhesive grip-tape wrap (installed)
The Gen4 series adds an enlarged, reversible magazine release and Glock’s Modular Back-Strap System, allowing shooters to tailor grip size without tools. These features make the pistol adaptable for various hand sizes while maintaining the classic Glock control layout.
The 4.61-inch steel barrel uses a nitride finish for corrosion resistance and octagonal rifling optimized for .45 ACP performance. A 1:15.75 RH twist stabilizes standard and +P loads alike, and the bore remains bright with sharp rifling.
Sighting duties are handled by a bright yellow fiber-optic front blade paired with a drift-adjustable steel square-notch rear. The contrast offers quick alignment in a range of lighting conditions, an advantage for defensive or competition roles.
The polymer frame retains Glock’s proven durability and houses a 5.5-pound striker-fired trigger for consistent pull weight. An integral Glock Universal accessory rail accepts lights or lasers, and straight rear slide serrations provide a positive grip when chambering rounds.