Glock G21 gen 4 pistol:
Jacobellis, Nick.
Glock G21 gen 4 pistol: a captive dual recoil spring and modular back straps make this .45 ACP easy to shoot and keep on target/ Nick Jacobellis. - California: Bobit Business Media, ©Sept 2013-May 2016. - v37 n11, pages 18-20; illustrations: 27 cm.
Police: the law enforcement.
0893-8989
Firearms.
DPer 363.205 P75 Sept 2013-May 2016 v. 37 & 40, n. 9-11/1-5
Glock G21 gen 4 pistol: a captive dual recoil spring and modular back straps make this .45 ACP easy to shoot and keep on target/ Nick Jacobellis. - California: Bobit Business Media, ©Sept 2013-May 2016. - v37 n11, pages 18-20; illustrations: 27 cm.
Police: the law enforcement.
0893-8989
Firearms.
DPer 363.205 P75 Sept 2013-May 2016 v. 37 & 40, n. 9-11/1-5