Laser For Xd40 Cal Sub-compact???

[BC4]

Is there a laser sight that will actually fit the Springfield XD40 CAL. [U]SUB-COMPACT. I bought a laserlyte for the GLOCK,HK P2000,AND THE SPRINGFIELD XD SERIES but the push button locks never reach the groove on the underside and by the 3rd round(aside from it sticking out so far) the thing was about to fall off? What about the WALTHER P22 LASER? Will it fit any other guns?????Thanks for advice in advance.;I