Our R&D on front mounted PVS-14s show problems with POA shift and the overall resolution/clarity is not as good as rear mounted PVS-14s. Stock extenders that we sell and/or an AR-15 with an adjustable stock are more than sufficient to take care of any eye relief issues on rear mounted PVS-14s. For maximum versatility such as goggle hands free applications, camera mounting, spotting scope mounting, hand held monocular applications, and weapon mounts for both short or long range shooting applications, the PVS-14 or MX-160 should be your NV of choice. Kevin