The 1045 is a dedicated 45 ACP Glock magazine fed AR-15 billet lower and upper receiver set. Includes last round bolt hold open.

Features:

Last round bolt hold open on an empty magazine
Flared magwell for faster reloads
Lower receiver accepts 45 ACP Glock magazines
Integrated, oversized trigger guard
7075-T6 billet aluminum lower receiver with a matte black hard-coat anodized finish
7075-T6 billet aluminum slick side upper receiver with appropriately sized ejection port and no forward assist or dust cover
Threaded bolt catch screw
For use with a 45 ACP bolt carrier assembly and a standard AR-15 hammer
Accepts all aftermarket Glock 45 ACP double stack magazines