Shield Arms: G17 + 5 Preinstalled Mag Extension - Black

The Shield Arms Glock 17+5 Pre-Installed Magazine Extension is a ready-to-use OEM Glock 17-round magazine body with a +5 aluminum extension, increasing total 9mm capacity to 22 rounds (29% boost). It arrives pre-assembled, function-tested, and includes a 12-coil power spring plus premium follower for reliable feeding.Key Specifications:Compatibility: Glock 17 (Gen 3/4/5), Glock 34 (Gen 3/4/5/MOS), Glock 19X, Glock 45 (Gen 5); fits most aftermarket Glock 17-pattern 9mm pistols and PCCs.
Materials: OEM Glock polymer magazine body; CNC-machined 6061 aluminum extension (Type-2 black hard anodized finish); high-performance 12-coil spring; premium polymer follower.
Dimensions: Adds ~1 inch in length; overall ~8 inches (vs. standard ~7 inches).
Certifications/Warranties: Lifetime warranty; “Spring for Life" free replacement springs; extension Made in USA (magazine body Austria/USA). Tool-free disassembly. Drop-in ready.